Apache Commons Math Release Notes
Release History
| Version |
Date |
Description |
| 4.0-beta2 |
TBD |
This is a major release that requires source changes in applications. Lower-level functionality has been split off to new components, often with bug-fixes, performance enhancements and improved API: Commons RNG, Commons Numbers, Commons Geometry, Commons Statistics. Functionality still within Commons Math has been modularized and partly refactored. This is a work-in-progress (help welcome). Codes for which the refactoring has not been undertaken (or was deemed incomplete) have been moved to 'legacy' modules. The minimum version of the Java platform required to compile and use Commons Math is Java 8. Users are encouraged to upgrade to this version, and to the new components listed above (they are now Commons Math's dependencies). For code now located in the 'commons-math-legacy' module, upgrading will be a matter of changing the top-level package name: From 'org.apache.commons.math3' to 'org.apache.commons.math4.legacy'. Code in the 'commons-math-legacy-core' module comprise classes that moved from package 'org.apache.commons.math3' and package 'org.apache.commons.math3.util' (e.g. 'MathArrays') to package 'org.apache.commons.math4.legacy.core'. Notes: Class 'FastMath' was renamed 'AccurateMath' (now located in package 'org.apache.commons.math4.legacy.core.jdkmath'). Caveat: Although hundreds of issues have been fixed (see 'git log' and the reports in the bug-tracking system of all the listed components), many remain due to the lack of human resources necessary in order to support the whole codebase (it was one of the main reasons for creating more focused components). |
| 4.0-beta1 |
2022-12-20 |
This is a major release that requires source changes in applications. Lower-level functionality has been split off to new components, often with bug-fixes, performance enhancements and improved API: Commons RNG, Commons Numbers, Commons Geometry, Commons Statistics. Functionality still within Commons Math has been modularized and partly refactored. This is a work-in-progress (help welcome). Codes for which the refactoring has not been undertaken (or was deemed incomplete) have been moved to 'legacy' modules. The minimum version of the Java platform required to compile and use Commons Math is Java 8. Users are encouraged to upgrade to this version, and to the new components listed above (they are now Commons Math's dependencies). For code now located in the 'commons-math-legacy' module, upgrading will be a matter of changing the top-level package name: From 'org.apache.commons.math3' to 'org.apache.commons.math4.legacy'. Code in the 'commons-math-legacy-core' module comprise classes that moved from package 'org.apache.commons.math3' and package 'org.apache.commons.math3.util' (e.g. 'MathArrays') to package 'org.apache.commons.math4.legacy.core'. Notes: Class 'FastMath' was renamed 'AccurateMath' (now located in package 'org.apache.commons.math4.legacy.core.jdkmath'). Caveat: Although hundreds of issues have been fixed (see 'git log' and the reports in the bug-tracking system of all the listed components), many remain due to the lack of human resources necessary in order to support the whole codebase (it was one of the main reasons for creating more focused components). |
| 3.6.1 |
2016-03-21 |
This is a minor bug fix release. It incorporates three bug fixes since version 3.6. The minimum version of the Java platform required to compile and use Commons Math 3.6.1 is Java 5. |
| 3.6 |
2016-01-05 |
This is a minor release: It combines bug fixes and new features. Changes to existing features were made in a backwards-compatible way such as to allow drop-in replacement of the v3.x JAR file. Most notable among the new features are: field-based version of Ordinary Differential Equations framework, numerous improvements in distributions, statistics and neuralnet packages, refactored implementation of microsphere interpolation algorithm, explicit specification of rotation convention to use (both vector operator and frame transform conventions are now available). The minimum version of the Java platform required to compile and use Commons Math is Java 5. Users are encouraged to upgrade to this version as this release not only includes bug fixes but also deprecates numerous classes and methods that will be deleted from the next major release (4.0). Caveat: 1. The implementation of the BOBYQA optimization algorithm is in alpha state (cf. MATH-621): Many code paths are untested, and we are looking for volunteers to improve the code readability, robustness and performance and to extend the unit tests suite. 2. A few methods in the FastMath class are in fact slower that their counterpart in either Math or StrictMath (cf. MATH-740 and MATH-901). |
| 3.5 |
2015-04-17 |
This is a minor release: It combines bug fixes and new features. Changes to existing features were made in a backwards-compatible way such as to allow drop-in replacement of the v3.4.1 JAR file. Most notable among the new features are: getQuadraticMean method added to DescriptiveStatistics SummaryStatistics which calculates the root mean square, and a way to build polyhedrons sets from list of vertices and the facets they belong too. There have been numerous bug fixes. See below for a full list. The minimum version of the Java platform required to compile and use Apache Commons Math is Java 5. Users are encouraged to upgrade to this version as this release not only includes bug fixes but also deprecates numerous classes and methods that will be deleted from the next major release (4.0). Caveat: 1. The implementation of the BOBYQA optimization algorithm is in alpha state (cf. MATH-621): Many code paths are untested, and we are looking for volunteers to improve the code readability, robustness and performance and to extend the unit tests suite. 2. A few methods in the FastMath class are in fact slower that their counterpart in either Math or StrictMath (cf. MATH-740 and MATH-901). |
| 3.4.1 |
2015-01-11 |
This is a maintenance release: It fixes issue MATH-1188. |
| 3.4 |
2014-12-26 |
This is a minor release: It combines bug fixes and new features. Changes to existing features were made in a backwards-compatible way such as to allow drop-in replacement of the v3.3 JAR file. Most notable among the new features are: new distributions (Gumbel, Laplace, Logistic, Nakagami), and improvements on percentiles algorithms (better handling for NaNs in the regular algorithm, plus a new storeless implementation). Bicubic and tricubic interpolators have been fixed and new implementations added. There have been numerous bug fixes and several improvements on performances or robustness. See below for a full list. The minimum version of the Java platform required to compile and use Apache Commons Math is Java 5. Users are encouraged to upgrade to this version as this release not only includes bug fixes but also deprecates numerous classes and methods that will be deleted from the next major release (4.0). Caveat: 1. The implementation of the BOBYQA optimization algorithm is in alpha state (cf. MATH-621): Many code paths are untested, and we are looking for volunteers to improve the code readability, robustness and performance and to extend the unit tests suite. 2. A few methods in the FastMath class are in fact slower that their counterpart in either Math or StrictMath (cf. MATH-740 and MATH-901). |
| 3.3 |
2014-05-05 |
This is a minor release: It combines bug fixes and new features. Changes to existing features were made in a backwards-compatible way such as to allow drop-in replacement of the v3.x JAR file. Most notable among the new features are: Framework for creating artificial neural nets, self organizing feature maps, computational geometry algorithms (convex hull, enclosing ball), performance improvements of the linear simplex solver, refactoring of curve fitters, low-discrepancy random generators (sobol, halton), least-squares fitting. The minimum version of the Java platform required to compile and use Commons Math is Java 5. Users are encouraged to upgrade to this version as this release not only includes bug fixes but also deprecates numerous classes and methods that will be deleted from the next major release (4.0). Caveat: 1. The implementation of the BOBYQA optimization algorithm is in alpha state (cf. MATH-621): Many code paths are untested, and we are looking for volunteers to improve the code readability, robustness and performance and to extend the unit tests suite. 2. A few methods in the FastMath class are in fact slower that their counterpart in either Math or StrictMath (cf. MATH-740 and MATH-901). 3. A few methods/constructors in the package o.a.c.m.geometry.partitioning have changed their signature in a non backwards-compatible way. The respective classes are intended to be package private only and are not supposed to be used for other purposes. |
| 3.2 |
2013-04-06 |
This is a minor release: It combines bug fixes and new features. Changes to existing features were made in a backwards-compatible way such as to allow drop-in replacement of the v3.1[.1] JAR file. Most notable among the new features are: Framework for automatic differentiation, Lévy distribution, prime numbers, enumerated distributions, real field allowing to use several algorithms (solvers, linear algebra, 3D geometry) with different real-like classes (high accuracy or automatic differentiation), spherical coordinates with gradients and Hessians, reorganized clustering package with different distance implementations. The minimum version of the Java platform required to compile and use Commons Math is Java 5. Users are encouraged to upgrade to this version as this release not only includes bug fixes but also deprecates numerous classes and methods that will be deleted from the next major release (4.0). Caveat: 1. The implementation of the BOBYQA optimization algorithm is in alpha state (cf. MATH-621): Many code paths are untested, and we are looking for volunteers to improve the code readability, robustness and performance and to extend the unit tests suite. 2. A few methods in the FastMath class are in fact slower that their counterpart in either Math or StrictMath (cf. MATH-740 and MATH-901). |
| 3.1.1 |
2013-01-14 |
This is a point release: It fixes a bug that renders version 3.1 unusable in some situations (see details below). |
| 3.1 |
2012-12-23 |
This is a minor release: It combines bug fixes and new features. Changes to existing features were made in a backwards-compatible way such as to allow drop-in replacement of the v3.0 JAR file. Most notable among the new features are: Framework for automatic differentiation, multivariate mixture model distribution, quaternions, Gauss integration framework, Hermite polynomial interpolation, eigenvalue decomposition of non-symmetric matrices, DBSCAN clustering. Most notable among the changes are: Greatly improved precision in the implementation of the Gamma and Beta special functions, optimizers API, deprecation of the sparse vector implementation. The minimal version of the Java platform required to compile and use Commons Math is Java 5. Users are encouraged to upgrade to this version as this release not only includes bug fixes but also deprecates numerous classes and methods that will be deleted from the next major release (4.0). Caveat: 1. The implementation of the BOBYQA optimization algorithm is in alpha state (cf. MATH-621): Many code paths are untested, and we are looking for volunteers to improve the code readability, robustness and performance and to extend the unit tests suite. 2. A few methods in the FastMath class are in fact slower that their counterpart in either Math or StrictMath (cf. MATH-740 and MATH-901). |
| 3.0 |
2012-03-07 |
This is a major release: It combines bug fixes, new features and changes to existing features. Most notable among the new features are: Iterative solvers, Kalman filter, ISAAC RNG, Illinois and Pegasus root finders, enhanced ODE framework, refactored geometry package, Binary Space Partition trees. Most notable among the changes are: Exclusive use of unchecked exceptions, removal of interfaces for which a single implementation is assumed to exist, improved coding and API consistency across packages, performance (matrix product, FFT) and robustness (SVD). Because of the base package name change, this release can be used together with earlier versions of Commons Math. The minimal version of the Java platform required to compile and use Commons Math is Java 5. Users are encouraged to upgrade to this version as, in addition to new features, this release includes numerous bug fixes. Users of Commons Math 2.0-2 should recompile their code against the 3.0 JAR file and must adjust the import statements to use the appropriate org.apache.commons.math3 base package. Most of the compilation errors users will encounter after the switch will be due to moved or deleted classes/interfaces resulting from package reorganization. Caveat: 1. The implementation of the BOBYQA optimization algorithm is in alpha state (cf. MATH-621): Many code paths are untested, and we are looking for volunteers to improve the code readability, robustness and performance and to extend the unit tests suite. 2. A few methods in the FastMath class are in fact slower that their counterpart in either Math or StrictMath (cf. MATH-740). |
| 2.2 |
2011-03-02 |
This is primarily a maintenance release, but it also includes new features and enhancements. Users of version 2.1 are encouraged to upgrade to 2.2, as this release includes some important bug fixes. See the detailed list of changes below for full description of all bug fixes and enhancements. This release contains some minor compatibility breaks with version 2.1 in some internal classes but none of them are in APIs likely to be accessed by user code: the MessagesResources_fr class has been removed (replaced by a properties file); the arguments of the EventState.reinitializeBegin method have changed; some protected fields which already had public accessors in AbstractStepInterpolator have been replaced. There is a behavior change that users of the multiple regression classes should be aware of. In version 2.1, there was no way to estimate models without intercept terms, and, while this was not clear from the documentation, design (X) matrices needed to include initial unitary columns. In 2.2, initial unitary columns are not necessary and whether or not models include intercept terms is configurable. See the change log and javadoc for the classes in org.apache.commons.math3.stat.regression for details. The major new features are: a new FastMath class, both faster, more accurate and with a few additional functions than StrictMath and Math; a new package for floating point arbitrary precision computing, including high level functions like exponential, sine, square root ...; new linear and tricubic interpolators; a new Gaussian curve fitter; a new erfc function; characteristic support for distributions; a set of new Well Equidistributed Long-period Linear (WELL) random generators. |
| 2.1 |
2010-04-02 |
This is primarily a maintenance release, but it also includes new features and enhancements. Users of version 2.0 are encouraged to upgrade to 2.1, as this release includes some important bug fixes. See the detailed list of changes below for full description of all bug fixes and enhancements. This release contains some minor API compatibility breaks with version 2.0: the return type of RealVector.copy() has been changed to AbstractRealVector; the no-argument constructor of MatrixUtils() has been made private; the mapXxxToSelf methods of OpenMapRealVector have been removed and some method return types have been changed in this class; new methods have been added to the RealVector interface; several fields in AdaptiveStepSizeIntegrator have been made final; DummyStepInterpolator requires an additional argument for one of its constructors; some protected fields have been removed from AbstractLeastSquaresOptimizer, AbstractScalarDifferentiableOptimizer and AbstractLinearOptimizer; and the isOptimal(SimplexTableau) method has been removed from SimplexSolver. |
| 2.0 |
2009-08-03 |
This is a major release. It combines bug fixes, new features and changes to existing features. Most notable among the new features are: decomposition algorithms in the linear algebra package (LU, QR, Cholesky, SVD, eigen decomposition) which are based on the popular JAMA API (but much faster); support for sparse matrices and vectors; support for any field-based matrix (Complex, Fraction ...); support for genetic algorithms; several new optimization algorithms (Dantzig's simplex for linear constrained problems, conjugate gradient, Brent); support for curve fitting with special cases for harmonic and polynomial functions; support for state derivative in ODE step handlers; new multistep integrators (Adams-Bashforth and Adams-Moulton) with variable stepsize; regression algorithms; rank transformations; Mersenne twister pseudo random number generator. This release is NOT source and binary compatible with earlier versions of Commons Math. Starting with version 2.0 of the library, the minimal version of the Java platform required to compile and use Commons Math is Java 5. Users are encouraged to upgrade to this version, as in addition to new features, this release includes numerous bug fixes. Users of Commons Math 1.0-1.2 should recompile their code against the 2.0 jar. Most of the compilation errors users will encounter after the switch will be due to classes moved due to package reorganization. These errors are simply solved by adjusting the import statements in users code. |
| 1.2 |
2008-02-24 |
This release combines bug fixes and new features. Most notable among the new features are the estimation, optimization, geometry and ode packages added from the Mantissa library. Implementations of fast Fourier transform, QR decomposition and several numerical integration algorithms have also been added, along with enhancements and extensions to packages included in Commons Math 1.1. This release is source and binary compatible with earlier versions of Commons Math. |
| 1.1 |
2005-12-17 |
This is a maintenance release containing bug fixes and enhancements. All API changes are binary compatible with version 1.0. The enhancements include some new probability distributions, a Fraction class, new matrix and numerical utilities, and a PRNG pluggability framework making it possible to replace the JDK-supplied random number generator in Commons Math (and elsewhere) with alternative PRNG implementations. |
| 1.0 |
2004-12-06 |
Apache Commons Math 1.0 - Initial Release |
Release 4.0-beta2 – TBD
| Type |
Changes |
By |
 |
"MultivariateNormalMixtureExpectationMaximization": Allow fitting single column data. |
aherbert |
|
Allow convergence checker to be specified as "OptimizationData". Fixes MATH-1658. |
erans |
|
Small refactoring of the "evaluation counter" in optimizers' base class:
Provide (protected) accessor (to replace method "computeObjectiveValue"). Fixes MATH-1657. Thanks to François Laferrière. |
erans |
|
"Array2DRowRealMatrix": Performance enhancement ("getEntry"). Fixes MATH-1654. Thanks to Cyril de Catheu. |
erans |
Release 4.0-beta1 – 2022-12-20
| Type |
Changes |
By |
|
Remove class "CombinatoricsUtils" (in package "o.a.c.m.util").
Functionality is in "Commons Numbers" combinatorics package. Fixes MATH-1653. |
aherbert |
 |
"HaltonSequenceGenerator": Raise exception when precondition is not met. Fixes MATH-1647. Thanks to Maksym Bohachov. |
erans |
 |
"BicubicInterpolator": Provide partial derivatives of interpolating functions. Fixes MATH-1648. Thanks to Alessandro Moscatelli. |
erans |
|
Do not change caller's arguments in "KMeansPlusPlusClusterer":
A negative value for "maxIterations" will raise an exception. Fixes MATH-1640. |
erans |
|
Add "ElkanKMeansPlusPlusClusterer" clustering algorithm. Fixes MATH-1371. Thanks to Artem Barger. |
erans |
|
Throw "ArithmeticException" instead of "MathArithmeticException". Fixes MATH-1629. |
erans |
|
Introduce "JdkMath" class for redirecting calls to either JDK or CM
implementations of the functions defined in "java.lang.Math". Fixes MATH-1630. |
erans |
|
"EmpiricalDistribution": Use constant kernel for bins that contain up to 3 values. Fixes MATH-1462. |
erans |
|
Simplify assertions with simpler equivalent. Thanks to Arturo Bernal. |
aherbert |
|
Update class "SimplexOptimizer" (in package "o.a.c.m.legacy.optim.nonlinear.scalar.noderiv")
to support simulated annealing. Fixes MATH-1622. |
erans |
|
Remove redundant local variables. Fixes MATH-1573. Thanks to Arturo Bernal. |
aherbert |
|
Simplify conditional expressions. Fixes MATH-1572. Thanks to Arturo Bernal. |
aherbert |
|
Refactor "EmpiricalDistribution" class (in package "o.a.c.m.legacy.distribution"). Fixes MATH-1616. |
erans |
|
Fix "LoessInterpolator" (in package "o.a.c.m.legacy.analysis.interpolation"). Fixes MATH-1379. Thanks to Richard Wilkinson. |
erans |
|
Class "BigReal": Fix equality check. Fixes MATH-1617. Thanks to Ng Tsz Sum. |
erans |
|
Clean up "o.a.c.math4.legacy.random" package. Fixes MATH-1595. |
erans |
|
Remove class "StableRandomGenerator" (in package "o.a.c.m.legacy.random"). Fixes MATH-1615. |
erans |
|
Refactor "SimplexOptimizer" (in package "o.a.c.m.legacy.optim.nonlinear.scalar.noderiv"). Fixes MATH-1614. |
erans |
|
Decrease maximum number of iterations in "SimpsonIntegrator" and
"TrapezoidIntegrator" (due to the available range of the internal
counter of function evaluations). Fixes MATH-1613. |
erans |
|
"EmpiricalDistribution" handles empty bin. Fixes MATH-1431. Thanks to Artem Onuchin. |
erans |
|
Transforms codes moved into a dedicated maven module. Fixes MATH-1582. |
erans |
|
ANN codes moved into a dedicated maven module. Fixes MATH-1578. |
erans |
|
Modularization set-up: All codes were moved into a "legacy" maven module.
WIP: Functionalities should gradually be moved into dedicated modules. Fixes MATH-1575. |
erans |
|
Add context to "OutOfRangeException". Fixes MATH-1565. Thanks to Randy Strauss. |
erans |
|
Add "Automatic-Module-Name" entry to JAR manifest file. Fixes MATH-1562. Thanks to Frank Ulbricht. |
erans |
|
"MidPointIntegrator": Fix iterative procedure in order to actually benefit
from evaluations performed at earlier stages. Fixes MATH-1558. Thanks to Sam Ritchie. |
erans |
|
"Atan2": Documentation issue. Fixes MATH-1555. Thanks to Laurent Galluccio. |
erans |
|
"Percentile": Partial support for weighted data. Fixes MATH-1551. Thanks to Allen Yu. |
erans |
|
Remove package "o.a.c.math4.geometry". Fixes MATH-1554. |
erans |
|
"SimplexTableau": Internally "scale down" the problem definition when the
constraints are defined with large numbers, in order to avoid spurious
exceptions caused by floating-point accuracy errors. Fixes MATH-1549. Thanks to Mohammad Rezaei. |
erans |
|
Avoid inefficiencies in computing the standard quality measures of a SOFM. Fixes MATH-1548. |
erans |
|
More flexible ranking of SOFM. Fixes MATH-1547. |
erans |
|
Clean-up (typos and unused "import" statements). Fixes MATH-1537. Thanks to Jin Xu. |
erans |
|
"EmpiricalDistribution": Workaround to avoid spurious exception. Fixes MATH-1531. |
erans |
|
"SplineInterpolator": Improved performance. Fixes MATH-1530. Thanks to Yassine Damerdji. |
erans |
|
"AkimaSplineInterpolator": Option to use alternative weights. Fixes MATH-1529. |
erans |
|
Add "MiniBatchKMeansClusterer" clustering algorithm. Fixes MATH-1509. Thanks to Chen Tao. |
erans |
|
Code reuse. Fixes MATH-1524. Thanks to Chen Tao. |
erans |
|
Issue in site generation and developers documentation. Fixes MATH-1511. |
erans |
|
Remove generic parameter in clustering evaluator interfaces. Fixes MATH-1522. Thanks to Chen Tao. |
erans |
|
Add "Calinski-Harabsz" clustering evaluator. Fixes MATH-1519. Thanks to Chen Tao. |
erans |
|
Abstract class "ClusterEvaluator" replaced by an interface. Fixes MATH-1523. |
erans |
|
Remove code duplication by moving method to class "Cluster". Fixes MATH-1518. |
erans |
|
Interface for ranking a list of clusters. Fixes MATH-1516. |
erans |
|
Do not use exceptions for control flow. Fixes MATH-1408. |
kinow |
|
Avoid overflow. Fixes MATH-1388. |
erans |
|
Removed deprecated class "Incrementor" (replaced by "IntegerSequence.Incrementor"). Fixes MATH-1362. |
erans |
|
Removed class "MultidimensionalCounter" (ported to "Commons Numbers"). Fixes MATH-1506. |
erans |
|
Removed class "BigFraction" (ported to "Commons Numbers"). Fixes MATH-1504. |
erans |
|
Removed class "Fraction" (ported to "Commons Numbers"). Fixes MATH-1446. |
erans |
|
Removed most codes in package "o.a.c.m.geometry".
"Commons Math" now depends on "Commons Geometry". Fixes MATH-1469. |
erans |
|
"SobolSequenceGenerator": Update data file. Fixes MATH-1481. Thanks to Théophile Charmont. |
erans |
|
"ClopperPearsonInterval": Missing cases. Fixes MATH-1401. Thanks to Michele De Stefano. |
erans |
|
"MillerUpdatingRegression": Fixed "ArrayIndexOutOfBounds" exception. Fixes MATH-1477. Thanks to Chee Sing Lee. |
erans |
|
"IntegerSequence.incrementor": Throw "NoSuchElementException" from "next" method. Fixes MATH-1463. |
erans |
|
Create a way to automatically calculate a Jacobian matrix using a differentiator. Fixes MATH-1459. Thanks to Adrian Porter. |
erans |
|
"SimpsonIntegrator": Fixed iteration. Fixes MATH-1458. Thanks to Alex Herbert. |
erans |
|
"DescriptiveStatistics": allow "Double[]" as initializer. Fixes MATH-1426. Thanks to Karl Richter. |
erans |
|
"PolynomialSplineFunction": incorrect usage of exception. Fixes MATH-1419. Thanks to Hang Park. |
erans |
|
add generics to the Frequency class. Fixes MATH-1413. |
kinow |
|
"RRQRDecomposition": bug in method "performHouseholderReflection". Fixes MATH-1417. Thanks to Jean-Francois Lecomte. |
erans |
|
Fix "BinomialTest": P-value larger than 1. Fixes MATH-1381. Thanks to Kexin Xie. |
kinow |
|
"MultivariateNormalDistribution": performance improvement (by
removing unnecessary copying). Fixes MATH-1382. Thanks to Stefan Bunk. |
erans |
|
"KolmogorovSmirnovTest": bug in "fixTies". Fixes MATH-1405. Thanks to Daniil Finkel. |
erans |
|
Performance improvement for Array2DRowRealMatrix.getSubMatrix(). Fixes MATH-1389. Thanks to Christoph Dibak. |
ebourg |
|
Dependency toward the "Commons Rng" component. Fixes MATH-1383. |
erans |
|
"SimplexOptimizer": Slight performance improvement. Fixes MATH-1377. |
erans |
|
"SimplexOptimizer": Wrong value of iteration number was passed to the convergence checker. Fixes MATH-1376. Thanks to Thomas Weise. |
erans |
|
Major refactoring of package "o.a.c.m.random". Fixes MATH-1319. |
erans |
|
Removed obsolete RNG API (replaced by classes under "o.a.c.m.rng"). Fixes MATH-1366. |
erans |
|
Gauss-Laguerre quadrature. Fixes MATH-1015. Thanks to Thomas Neidhart. |
erans |
|
"o.a.c.m.special.Gamma.digamma": Improved performance (through the use of
the reflection formula for negative arguments). Fixes MATH-1318. Thanks to Eric Prescott-Gagnon. |
erans |
|
Improved code coverage (unit tests). Fixes MATH-1350. Thanks to Rob Tompkins. |
erans |
|
New 64-bits RNG implementations. On 64-bits systems, they are ~35% faster than
"java.util.Random" for generating "long" or "double" values. They also guarantee
much better randomness than "Random" (cf. MATH-1327). Fixes MATH-1336. |
erans |
|
Refactoring of uniform random number generator functionality: new API
implemented in package "o.a.c.m.rng". Fixes MATH-1335. |
erans |
|
Avoid exception swallowing (in class "TestUtils"). Fixes MATH-1340. |
erans |
|
Avoid redundant object creation. Fixes MATH-1339. |
erans |
|
Adaptor class from new API ("o.a.c.m.rng.RandomSource") to old API
("o.a.c.m.random.RandomGenerator"). Fixes MATH-1337. |
erans |
|
Report on performance and correctness of the new RNG implementations. Fixes MATH-1327. |
erans |
|
Javadoc of the new RNG API ("o.a.c.m.rng") mentions the "seed problem". Fixes MATH-1314. |
erans |
|
New interface for sampling from distribution (package "o.a.c.m.distribution"). Fixes MATH-1158. |
erans |
|
"HypergeometricDistribution": Handle special cases that produced NaN. Fixes MATH-1356. |
erans |
|
New sampler API for "MultivariateRealDistribution". Fixes MATH-1351. |
erans |
|
Adaptor for using one of the new RNG implementations where an instance of
"java.util.Random" is required. Fixes MATH-1348. |
erans |
|
"BetaDistribution": Removed unnecessary recomputation. Fixes MATH-1343. |
erans |
|
"JDKRandomGenerator": Method "nextInt(int)" now throws a "NotStrictlyPositiveException".
The class now delegates to (rather inherits from) "java.util.Random". Fixes MATH-1124. |
erans |
|
"AbstractRandomGenerator" and "BitsStreamGenerator": Slight performance
improvement of the "nextBytes" method (particularly when the number of
requested bytes is a multiple of 4). Fixes MATH-1305. Thanks to Rostislav Krasny. |
erans |
|
"AbstractRandomGenerator" and "BitsStreamGenerator": Remove a redundant call
to the random data provider. Fixes MATH-1300. Thanks to Rostislav Krasny. |
erans |
|
"FactorialLog": Cache-based computation of the "log factorial" function (implemented
as an inner class of "CombinatoricsUtils" in package "o.a.c.m.util"). Fixes MATH-1295. Thanks to Aleksei Dievskii. |
erans |
|
Added divideUnsigned and remainderUnsigned to ArithmeticUtils. Fixes MATH-1271. Thanks to Qualtagh. |
luc |
|
Lifted unnecessary restriction on constructor's argument of
"MicrosphereInterpolator" (package "o.a.c.m.analysis.interpolation"). Fixes MATH-1231. |
erans |
|
The "SimplexSolver" will now throw a "DimensionMismatchException"
when calling "optimize(...)" with linear constraints whose dimension
does not match the dimension of the objective function. Fixes MATH-1230. |
tn |
|
Added a fast implementation of IEEEremainder in FastMath. |
luc |
|
Use Double.isNaN rather than x != x in FastMath. Fixes MATH-1222. Thanks to Benedikt Ritter. |
luc |
|
Added helper methods to FunctionUtils for univariate and multivariate differentiable functions conversion. Fixes MATH-1143. |
luc |
|
Removed unused package private class PollardRho in package primes. Fixes MATH-964. |
tn |
|
Improve performance of "ZipfDistribution" by caching the nth generalized harmonic. Fixes MATH-1221. |
tn |
|
"MathRuntimeException" is now the base class for all commons-math
exceptions (except for "NullArgumentException" which extends
"NullPointerException"). Fixes MATH-853. |
tn |
 |
Removed methods "test(...)" from "AbstractUnivariateStatistic".
The already existing methods "MathArrays#verifyValues(...)" shall
be used instead. Fixes MATH-1205. |
tn |
|
The abstract class "AbstractStorelessUnivariateStatistic" does not
extend anymore from "AbstractUnivariateStatistic". Fixes MATH-1205. |
tn |
|
Default implementation of
"AbstractStorelessUnivariateStatistic#equals(Object)"
will only return true if both instances have the same type. Previously
different statistics were considered to be equal if their current state
happened to be equal. Fixes MATH-1205. |
tn |
|
Default implementations of "AbstractStorelessUnivariateStatistic#evaluate(...)"
do not alter the internal state anymore. Instead a temporary copy of
the statistic is created for evaluation purposes. Fixes MATH-1205. |
tn |
|
Methods "evaluate(...)" of class "Variance" changed the internal state
although it was stated differently in the javadoc. Fixes MATH-1205. |
tn |
|
Fixed ignored method parameters in QRDecomposition protected methods. Fixes MATH-1191. |
luc |
|
Changed javadoc as the RandomDataGenerator class does not implement
an interface anymore (the previous interface has been deprecated in
3.X and removed in 4.0). Fixes MATH-1212. |
luc |
|
Added new API methods in "LeastSquaresProblem.Evaluation" (package
"o.a.c.m.fitting.leastsquares"). Fixes MATH-1206. |
erans |
|
"QRDecomposition": include information about the condition that
triggers a "SingularMatrixException". Fixes MATH-1210. |
erans |
|
Removed broken synchronization support in "ResizableDoubleArray". Fixes MATH-757. |
tn |
|
Added method "T log10()" to interface "RealFieldElement". Fixes MATH-945. |
tn |
|
"SpearmansCorrelation" will now throw an "MathIllegalArgumentException"
if provided with a "NaturalRanking" instance that uses "REMOVED" as "NaNStrategy". Fixes MATH-869. |
tn |
|
"NullArgumentException" extends now "java.lang.NullPointerException"
instead of "MathIllegalArgumentException". Fixes MATH-869. |
tn |
|
Renamed "cumulativeProbability(double, double)" to "probability(double, double)"
in "IntegerDistribution" and "RealDistribution". Fixes MATH-839. Thanks to Gilles Sadowski. |
tn |
|
Added logDensity(double) to RealDistribution and logProbability(int)
to IntegerDistribution interface. The implementations have already been
updated in release 3.3. Fixes MATH-1039. Thanks to Aleksei Dievskii. |
tn |
|
WELL type pseudo-random number generators have been refactored:
the cached indirection index tables per instance are now stored
in a static instance. This reduces the initialization cost when
creating a new instance. Fixes MATH-1155. |
tn |
|
Removed "ArithmeticUtils#pow(int, long)" and "ArithmeticUtils#pow(long, long)". Fixes MATH-1050. |
tn |
|
Method "LaguerreSolver#laguerre(...)" has been made private. Fixes MATH-825. Thanks to Gilles Sadowski. |
tn |
|
Field "windowSize" in "DescriptiveStatistics" has been made private. Fixes MATH-760. Thanks to sebb. |
tn |
Release 3.6.1 – 2016-03-21
| Type |
Changes |
By |
|
Add uniformity unit tests to "RandomGeneratorAbstractTest". Fixes MATH-1317. |
psteitz |
|
Fix code example in User Guide > Statistics > Multiple linear regression. Fixes MATH-1316. |
psteitz |
|
Fix ODE integrators when multiple events are nearly simultaneous. Fixes MATH-1342. |
evan |
Release 3.6 – 2016-01-05
| Type |
Changes |
By |
|
Improved performance and accuracy of 2-sample KolmogorovSmirnov tests. Fixes MATH-1310. |
psteitz |
|
Detect start failures with multi-step ODE integrators. Fixes MATH-1297. |
luc |
|
Added a RotationConvention enumerate to allow specifying the semantics
or axis/angle for rotations. This enumerate has two values:
VECTOR_OPERATOR and FRAME_TRANSFORM. Fixes MATH-1302,MATH-1303. |
luc |
|
Fixed stability issues with Adams-Bashforth and Adams-Moulton ODE integrators.
The integrators did not estimate the local error properly and were sometimes
stuck attempting to reduce indefinitely the step size as they thought the
error was too high. Thanks to Julien Queyrel. |
luc |
|
Added a field-based version of Ordinary Differential Equations framework.
This allows integrating ode that refer to RealField elements instead of
primitive double, hence opening the way to use DerivativeStructure to
compute partial differential without using variational equations, or to solve
ode with extended precision using Dfp. Fixes MATH-1288. |
luc |
|
Increased default value for number of allowed evaluations in
"o.a.c.m.optim.univariate.BracketFinder". Fixes MATH-1295. Thanks to Luke Lindsay. |
erans |
|
Modified 2-sample KolmogorovSmirnovTest to handle ties in sample data. By default,
ties are broken by adding random jitter to input data. Also added bootstrap method
analogous to ks.boot in R Matching package. Fixes MATH-1246. |
psteitz |
|
Fixed potential race condition in PolynomialUtils#buildPolynomial in
case polynomials are generated from multiple threads. Furthermore, the
synchronization is now performed on the coefficient list instead of the class. Fixes MATH-1294. Thanks to Kamil Włodarczyk. |
tn |
|
Added bootstrap method to KolmogorovSmirnov test. Fixes MATH-1246. |
psteitz |
|
Added constructors taking sample data as arguments to enumerated real and integer distributions. Fixes MATH-1287. |
psteitz |
|
Fixed FastMath.exp that potentially returned NaN for non-NaN argument. Fixes MATH-1269. |
oertl |
|
Added a nth order Brent solver for general real fields, replacing the former
solver that was restricted to Dfp fields only. |
luc |
|
New "Range" inner class of "o.a.c.m.util.IntegerSequence". Fixes MATH-1286. |
erans |
|
Updated reference in ZipfDistribution's javadoc. Fixes MATH-1285. Thanks to Pim van der Hoorn. |
oertl |
|
Fixed "Gamma#gamma(double)" for negative values smaller than -20. Fixes MATH-1283. Thanks to Jean Noel Delavalade. |
tn |
|
Fixed javadoc of methods {floorDiv,floorMod} in class "FastMath". Fixes MATH-1237. Thanks to Ken Williams. |
tn |
|
"AggregateSummaryStatistics" can now aggregate any kind of
"StatisticalSummary". Fixes MATH-837. |
tn |
|
Check precondition (class "o.a.c.m.random.EmpiricalDistribution"). Fixes MATH-1279. |
erans |
|
Deep copy of "Network" (package "o.a.c.m.ml.neuralnet") to allow evaluation of
of intermediate states during training. Fixes MATH-1278. |
erans |
|
Improved performance of sampling and inverse cumulative probability calculation
for geometric distributions. Fixes MATH-1276. |
oertl |
|
Fixed incorrect Kendall's tau coefficient calculation due to internal integer overflow. Fixes MATH-1277. Thanks to Marc Rosen. |
oertl |
|
Representation of Kolmogorov-Smirnov statistic as integral value. Fixes MATH-1274. |
oertl |
|
Added negative zero support in FastMath.pow. Fixes MATH-1273. Thanks to Qualtagh. |
luc |
|
Various SOFM visualizations (in package "o.a.c.m.ml.neuralnet.twod.util"):
Unified distance matrix, hit histogram, smoothed data histograms,
topographic error, quantization error. Fixes MATH-1270. |
erans |
|
New interfaces to be implemented by algorithms that visualizes properties
of a "NeuronSquareMesh2D" (package "o.a.c.m.ml.neuralnet.twod.util"). Fixes MATH-1268. |
erans |
|
Reimplemented pow(double, double) in FastMath, for better accuracy in
integral power cases and trying to fix erroneous JIT optimization again. |
luc |
|
Added a pow(double, long) method in FastMath. |
luc |
|
Fixed split/side inconsistencies in BSP trees. Fixes MATH-1266. |
luc |
|
"NeuronSquareMesh2D" (package "o.a.c.m.ml.neuralnet.twod") implements "Iterable". Fixes MATH-1265. |
erans |
|
"MapUtils" (package "o.a.c.m.ml.neuralnet"): Method to sort units according to distance
from a given vector. Fixes MATH-1264. |
erans |
|
Accessor (class "o.a.c.m.ml.neuralnet.twod.NeuronSquareMesh2D"). Fixes MATH-1263. |
erans |
|
New "IntegerSequence" class (in package "o.a.c.m.util") with "Incrementor" inner class. Fixes MATH-1259. |
erans |
|
Faster generation of Zipf distributed random numbers by using rejection-inversion sampling. Fixes MATH-1220. |
oertl |
|
Improved performance of sort-in-place methods by avoiding boxing. Fixes MATH-990. |
oertl |
|
Avoid overflow in "Fraction" (multiplication or division by an int). Fixes MATH-1261. Thanks to Osamu Ikeuchi. |
erans |
|
Added check for equal array lengths to distance measure functions. Fixes MATH-1258. Thanks to Gunel Jahangirova. |
oertl |
|
Better accuracy in computation of cumulative probability of "NormalDistribution"
(package "o.a.c.m.distribution"). Fixes MATH-1257. Thanks to Bill Murphy. |
erans |
|
Boundary check to construct an "Interval" (package "o.a.c.m.geometry.euclidean.oned"). Fixes MATH-1256. |
erans |
|
Wrong neighbourhood size in class "KohonenUpdateAction" (package "o.a.c.m.ml.neuralnet.sofm"). Fixes MATH-1255. |
erans |
|
ResizableDoubleArray constructor does not work with double array of size 1. Fixes MATH-1252. Thanks to John Bay. |
psteitz |
|
Fixed initial value of "number of calls" counter in class "KohonenUpdateAction"
(package "o.a.c.m.ml.neuralnet.sofm"). Fixes MATH-1251. |
erans |
|
"Neuron" class (package "o.a.c.m.ml.neuralnet"): added methods that can be used
to assess concurrency performance. Fixes MATH-1250. |
erans |
|
Removed unnecessary allocations in "BigFraction" (package "o.a.c.m.fraction"). Fixes MATH-1248. Thanks to Chris Popp. |
erans |
|
Fixed error in computing discrete distribution of D statistics for small-sample
2-sample Kolmogorov-Smirnov tests. Error was causing incorrect p-values returned
by exactP and monteCarloP methods (used by default for small, mid-size samples). Fixes MATH-1245. |
psteitz |
|
Refactored implementation of the "miscrosphere projection"
interpolation algorithm.
New classes: "MicrosphereProjectionInterpolator",
"InterpolatingMicrosphere" and "InterpolatingMicrosphere2D"
replace "MicrosphereInterpolator" and "MicrosphereInterpolatingFunction".
(package "o.a.c.m.analysis.interpolation"). Fixes MATH-1243. |
erans |
|
Method "cosAngle" in "o.a.c.m.util.MathArrays". Fixes MATH-1244. |
erans |
|
"KolmogorovSmirnovTest#ksSum(...)" returned wrong result in case the provided
t-parameters was zero. This affected the calculation of "approximateP(...)" for
identical samples. Fixes MATH-1240. |
tn |
|
Improved performance to calculate the two-sample Kolmogorov-Smirnov test
via monte carlo simulation ("KolmogorovSmirnovTets#monteCarloP(...)"). Fixes MATH-1242. Thanks to Otmar Ertl. |
tn |
|
A "StackOverflowException" was thrown when passing Double.NaN or infinity
to "Gamma#digamma(double)" or "Gamma#trigamma(double)". Now the input value
is propagated to the output if it is not a real number. Fixes MATH-1241. Thanks to Aleksei Dievskii. |
tn |
|
Improved performance of calculating the two-sample Kolmogorov-Smirnov
test statistic. Fixes MATH-1232. Thanks to Otmar Ertl. |
tn |
|
Fixed error message for unknown parameter name in ODE. Fixes MATH-1232. |
luc |
|
Fixed wrong event detection in case of close events pairs. Fixes MATH-1226. |
luc |
|
Fix potential branching errors in "FastMath#pow(double, double)" when
passing special values, i.e. infinity, due to erroneous JIT optimization. |
tn |
|
Fixed equals/hashcode contract failure for Dfp. Fixes MATH-1118. |
luc |
|
Fixed wrong splitting of huge number in extended accuracy algorithms. Fixes MATH-1223. |
luc |
|
Improve performance of "BetaDistribution#sample()" by using Cheng's algorithm. Fixes MATH-1153. Thanks to Sergei Lebedev. |
tn |
|
Computation of 2-sample Kolmogorov-Smirnov statistic in case of ties
was not correct. Fixes MATH-1197. |
tn |
Release 3.5 – 2015-04-17
| Type |
Changes |
By |
|
Moved FastMathTestPerformance out of the main test tree, as is is
a benchmark rather than a test. Fixes MATH-1195. |
luc |
|
Added a way to build polyhedrons sets from a list of vertices and
facets specified using vertices indices. |
luc |
|
Added Laguerre complex solve methods taking maxEval parameters. Fixes MATH-1213. |
psteitz |
|
Fixed ignored method parameters in QRDecomposition protected methods. Fixes MATH-1191. |
luc |
|
Fixed wrong selection of line/polyhedron intersection point. Fixes MATH-1211. Thanks to Mike Zimmerman. |
luc |
|
Improved fix for corner cases in BSP-tree merging, when cut sub-hyperplanes vanish. Fixes MATH-1162. |
luc |
|
Fixed link to algorithm description in "PoissonDistribution#sample()". Fixes MATH-1209. Thanks to Jonathan Ogilvie. |
tn |
|
EmpiricalDistribution cumulativeProbability can return NaN when evaluated within a constant bin. Fixes MATH-1208. |
psteitz |
|
EmpiricalDistribution getKernel fails for buckets with only multiple instances of the same value. Fixes MATH-1203. |
psteitz |
|
"UnivariateSolverUtils#bracket(...)" sometimes failed to bracket
if a reached the lower bound. Fixes MATH-1204. |
evanward |
|
Simplified "FastMath#exp(double)" in order to avoid a potential
Java 1.5 JIT bug when calling with negative infinity as argument. Fixes MATH-1198. |
sebb |
|
Added method "getQuadraticMean()" to "DescriptiveStatistics"
and "SummaryStatistics" which calculates the root mean square. Fixes MATH-1199. |
erans |
Release 3.4.1 – 2015-01-11
| Type |
Changes |
By |
|
Fixed non-Java1.5 code in BesselJ. Fixes MATH-1188. |
sebb |
Release 3.4 – 2014-12-26
| Type |
Changes |
By |
|
Added Bessel functions of the first kind, based on NetLib implementation. Fixes MATH-1066. Thanks to Brian Wignall. |
psteitz |
|
Improve performance of kalman gain calculation in "KalmanFilter" by
directly solving a linear system rather than computing the matrix
inverse. Fixes MATH-1142. Thanks to Arne Schwarz. |
tn |
|
Fixed integer overflow in KolmogorovSmirnovTest causing 2-sample test
to use exact method when the product of the sample sizes exceeds
Integer.MAX_VALUE, resulting in effectively hung execution. Fixes MATH-1181. |
psteitz |
|
Method to create a sequence of integers (in "o.a.c.m.util.MathArrays"). Fixes MATH-1180. |
erans |
|
New class "SimpleCurveFitter": Boiler-plate code to allow fitting of
a user-defined parametric function. Fixes MATH-1172. |
erans |
|
New classes "TricubicInterpolatingFunction" and "TricubicInterpolator" to
replace "TricubicSplineInterpolatingFunction" and "TricubicSplineInterpolator". Fixes MATH-1173. |
erans |
|
Fixed example in userguide ("stat" section). Fixes MATH-1178. Thanks to Dmitriy. |
erans |
|
Fixed inverse cumulative probability of 0 in "LaplaceDistribution". Fixes MATH-1175. Thanks to Karsten Loesing. |
erans |
|
New classes "BicubicInterpolatingFunction" and "BicubicInterpolator" to
replace "BicubicSplineInterpolatingFunction" and "BicubicSplineInterpolator". Fixes MATH-1166. |
erans |
|
Spurious vertices in the middle of otherwise straight edges are now
filtered out when rebuilding polygons boundaries from BSP trees. |
luc |
|
Fixed a problem with too thin polygons considered to have infinite size. Fixes MATH-1174. |
luc |
|
Boundary attributes in regions now provides the BSP tree nodes that
were used to split the sub-hyperplane forming the boundary part of the facet. |
luc |
|
Fixed a problem with vanishing cut sub-hyperplanes during BSP tree merging. Fixes MATH-1162. |
luc |
|
"o.a.c.m.stat.regression.OLSMultipleLinearRegression": Use threshold
when performing "QRDecomposition". Fixes MATH-1167. Thanks to Neil Ireson. |
erans |
|
"FuzzyKMeansClusterer" has thrown an exception in case one of the data
points was equal to a cluster center. Fixes MATH-1165. Thanks to Pashutan Modaresi. |
tn |
|
Interface to allow parameter validation in "o.a.c.m.fitting.leastsquares":
the point computed by by the optimizer can be modified before evaluation. Fixes MATH-1144. |
erans |
|
Provide access to state derivatives in ContinuousOutputModel. Fixes MATH-1160. |
luc |
|
Fixed bicubic spline interpolator, using Akima splines. Fixes MATH-1138. Thanks to Hank Grabowski. |
luc |
|
Changed classes in the inference package that instantiate distributions to
pass null RandomGenerators to avoid initialization overhead for the default
generator. Fixes MATH-1154. |
psteitz |
|
Added all Java 8 StrictMath methods to FastMath, so FastMath remains compatible
with newer Java versions. Fixes MATH-1156. |
luc |
|
Added Gumbel, Laplace, Logistic and Nakagami distributions. Fixes MATH-1139. Thanks to Alexey Volkov. |
tn |
|
Added statistics missing from toString method in SummaryStatistics. Fixes MATH-1147. |
psteitz |
|
Improved performance of "EnumeratedDistribution#sample()" by caching
the cumulative probabilities and using binary rather than a linear search. Fixes MATH-1152. Thanks to Andras Sereny. |
tn |
|
"MonotoneChain" did not take the tolerance factor into account when
sorting the input points. In case of collinear points this could result
in a "ConvergenceException" when computing the hull. Fixes MATH-1148. Thanks to Guillaume Marceau. |
tn |
|
Interface "ValueAndJacobianFunction" is a precondition for lazy
evaluation (in "o.a.c.m.fitting.leastsquares"). Fixes MATH-1151. |
erans |
|
Fix potential integer overflows in "MannWhitneyUTest" when providing
large sample arrays. Fixes MATH-1145. Thanks to Anders Conbere. |
tn |
|
Fixed potential null pointer dereferencing in constructor of
"DummyStepInterpolator(DummyStepInterpolator)". Fixes MATH-1149. Thanks to M Kim. |
tn |
|
Fixed BinomialDistribution to deal with degenerate cases correctly. Fixes MATH-1136. Thanks to Aleksei Dievskii. |
psteitz |
|
"MonotoneChain" failed to generate a convex hull if only a minimal hull
shall be created (includeCollinearPoints=false) and collinear hull points
were present in the input. Fixes MATH-1135. Thanks to Guillaume Marceau. |
tn |
|
Improve performance of "KolmogorovSmirnovTest#kolmogorovSmirnovTest(...)" for
large samples. Also changed implementation for large n to use Pelz-Good
approximation. Fixes MATH-1131. Thanks to Schalk W. Cronjé. |
psteitz |
|
"BicubicSplineInterpolatingFunction": all fields made final and initialized in
the constructor. Added flag to request initialization, or not, of the internal
data needed for partial derivatives. Fixes MATH-1134. |
erans |
|
Constrained EmpiricalDistribution sample/getNextValue methods to return
values within the range of the data; correctly linked RandomGenerator to
superclass so that RealDistribution reseedRandomGenerator method works. Fixes MATH-984. |
psteitz |
|
Added several different estimation types and NaN handling strategies for Percentile. Fixes MATH-1120. Thanks to Venkatesha Murthy. |
luc |
|
Added implementation of PSquare algorithm to estimate percentiles without
storing data in memory (i.e. as StorelessUnivariateStatistic). Fixes MATH-418. Thanks to Venkatesha Murthy. |
psteitz |
|
"Percentile": wrong sorting in the presence of NaN. Fixes MATH-1129. |
erans |
|
Added lazy evaluation to "LeastSquaresFactory" (in "o.a.c.m.fitting.leastsquares")
to avoid evaluating the model when the optimization algorithm does not actually
require it. Fixes MATH-1128. |
erans |
|
Fixed overflow in Precision.equals with ulps (both double and float versions). Fixes MATH-1127. |
luc |
|
Performance improvements for Student's t-distribution. Fixes MATH-1125. Thanks to Ajo Fod. |
tn |
|
Fixed NullPointerException when chopping-off a sub-hyperplane
that is exactly at a region boundary. Fixes MATH-1123. Thanks to Aurélien Labrosse. |
luc |
|
"BrentOptimizer": increment base class iteration counter. Fixes MATH-1121. Thanks to Ajo Fod. |
erans |
Release 3.3 – 2014-05-05
| Type |
Changes |
By |
|
Added new constructor to "OLSMultipleLinearRegression" to be able
to specify a custom singularity threshold for QR decomposition. Fixes MATH-1110. Thanks to Edward Segall. |
tn |
|
Extracted class "LineSearch" from "PowellOptimizer", to be used in
"NonLinearConjugateGradientOptimizer" (in place of the implementation
that triggered this issue). Fixes MATH-1092. |
erans |
|
Build properly empty polyhedrons set when given equal min/max boundaries. Also explained
better in the javadoc about some wrong usage of PolyhedronsSet constructor. Fixes MATH-1115. |
luc |
|
Build properly empty polygons set when given equal min/max boundaries. Also explained
better in the javadoc about some wrong usage of PolygonsSet constructor. Fixes MATH-1117. |
luc |
|
Added a fast single-step method for fixed-step Runge-Kutta integrators. Fixes MATH-1119. |
luc |
|
"Complex": Fixed compatibility of "equals(Object)" with "hashCode()".
Added new methods for testing floating-point equality between the real
(resp. imaginary) parts of two complex numbers. Fixes MATH-1118. |
erans |
|
Added an order 6 fixed-step ODE integrator designed by H. A. Luther in 1968. |
luc |
|
Bracketing utility for univariate root solvers returns a tighter interval than before.
It also allows choosing the search interval expansion rate, supporting both linear
and asymptotically exponential rates. |
luc |
|
Prevent penalties to grow multiplicatively in CMAES for out of bounds points. Fixes MATH-1107. Thanks to Bruce A Johnson. |
luc |
|
Added KolmogorovSmirnovTest class, deprecating KolmogorovSmirnovDistribution. Fixes MATH-437. |
psteitz |
|
Improved documentation of QR decomposition handling of singular matrices. Fixes MATH-1101. |
luc |
|
QR decomposition can compute pseudo-inverses for tall matrices. Fixes MATH-1053. Thanks to Sean Owen. |
luc |
|
Field vectors now implement the visitor pattern just like real vectors. Fixes MATH-820. |
luc |
|
Un-deprecated RealVector.sparseIterator, documenting explicitly that entries
not iterated above are the zero ones. Fixes MATH-875. |
luc |
|
Relaxed specification for function mapping on vectors, thus allowing straightforward
implementation for sparse vectors. Fixes MATH-821. |
luc |
|
Make QR the default in GaussNewtonOptimizer. Fixes MATH-1099. Thanks to Evan Ward. |
luc |
|
Add Cholesky option to GaussNewtonOptimizer. Fixes MATH-1099. Thanks to Evan Ward. |
luc |
|
Make QR in GaussNewton faster and more accurate. Fixes MATH-1099. Thanks to Evan Ward. |
luc |
|
The sparse vector and matrix classes have been un-deprecated. This is a reversal
of a former decision, as we now think we should adopt a generally accepted
behavior which is ... to ignore the problems of NaNs and infinities in
sparse linear algebra entities. Fixes MATH-870. |
luc |
|
Added MonotoneChain algorithm to compute the convex hull of a collection of
points in 2D. Additionally, the AklToussaintHeuristic can be used to speed up
the generation. Fixes MATH-749. |
tn |
|
Calculating the inverse cumulative probability of an "EnumeratedRealDistribution"
will now return the correct result according to the selected enumerated probability
mass function. Fixes MATH-1065. Thanks to matteodg. |
tn |
|
Deprecated "ArithmeticUtils#pow(int, long)" and "ArithmeticUtils#pow(long, long)"
in favor of corresponding methods "ArithmeticUtils#pow(..., int)". Fixes MATH-1050. |
erans |
|
Create additional artifact "commons-math3-x.y.z-tools.jar" as part of the
release process. This artifact contains useful tools, e.g. for performance testing. Fixes MATH-976. |
erans |
|
Improved performance of "MathArrays#sortInPlace(...)". Fixes MATH-990. |
erans |
|
Clarify javadoc of "DecompositionSolver#getInverse()" and corresponding implementations
wrt the actually returned inverse. Several decomposition implementations are able
to return a pseudo-inverse in case of a singular matrix. Fixes MATH-1044. Thanks to Sean Owen. |
tn |
|
Added Emo Welzl algorithm to find the smallest enclosing ball of a collection of points. Fixes MATH-1095. |
luc |
|
Fixed an indexing problem in "BicubicSplineInterpolatingFunction" which
resulted in wrong interpolations. Fixes MATH-985. Thanks to Johnathan Kool. |
erans |
|
Added a constructor to "AbstractListChromosome" that does not copy the
input argument. Fixes MATH-1072. |
tn |
|
BSP tree now provides an API to compute a global signed distance from
a test point to the region. The distance is positive if the point is
outside of the region, negative if the point is inside, and zero
when the point is at the boundary. The distance is continuous
everywhere, so it can be used with a root solver to identify accurately
boundary crossings. This API is available for all BSP trees, in
Euclidean and spherical geometries, and in all dimensions. Fixes MATH-1091. |
luc |
|
Added new geometry sub-packages: spherical.oned which deals with geometry
on the 1-sphere (i.e. the circle) and spherical.twod which deals with the
2-sphere (i.e. the regular sphere). BSP trees can be used in these new
spaces, so one can build arcs sets and spherical polygons sets with all
the regular operations (inside/outside/boundary checks, union, intersection,
symetric difference, complement ...). |
luc |
|
IntervalsSet now implements Iterable<double[]>, so one can iterate
over the sub-intervals without building a full list containing
a copy of everything beforehand. Fixes MATH-1090. |
luc |
|
"Precision#round(double, ...)" will now return negative zero for negative
values rounded to zero, similar to the float variant. Fixes MATH-1089. |
tn |
|
The iterator returned by "MultiDimensionalCounter#iterator()" will now
correctly throw a "NoSuchElementException" when calling "next()" and the
iterator is already exhausted. Fixes MATH-1088. |
erans |
|
Fixed an issue with noisy functions for ODE events detection. |
luc |
|
Utilities for creating artificial neural networks (package "o.a.c.m.ml.neuralnet").
Implementation of Kohonen's Self-Organizing Feature Map (SOFM). Fixes MATH-923. |
erans |
|
The cutOff mechanism of the "SimplexSolver" in package o.a.c.math3.optim.linear
could lead to invalid solutions. The mechanism has been improved in a way that
the tableau does not need to be updated anymore. Additionally, a new check will
prevent impossible solutions to be returned as valid. Fixes MATH-1082. |
tn |
|
Improved performance of "SimplexSolver" in package o.a.c.math3.optim.linear by
directly performing row operations and keeping track of the current basic variables. Fixes MATH-1079. |
tn |
|
The "LinearConstraintSet" will now return the enclosed collection of "LinearConstraint"
objects in the same order as they have been added. Fixes MATH-1080. |
tn |
|
Added support for different pivot selection rules to the "SimplexSolver" by introducing
the new "OptimizationData" class "PivotSelectionRule". Currently supported rules are:
Dantzig (default) and Bland (avoids cycles). Fixes MATH-842. |
tn |
|
Fix "Precision#round(float, int, int)" when using rounding mode "BigDecimal.ROUND_UP"
and the discarded fraction is zero. Fixes MATH-1070. Thanks to Oleksandr Muliarevych. |
tn |
|
Use "FastMath" instead of "Math" within Commons Math. Fixes MATH-1059. |
tn |
|
Avoid overflow when calculating Kendall's correlation for large arrays. Fixes MATH-1068. Thanks to Gal Lalouche. |
tn |
|
Avoid infinite recursion in "Beta.regularizedBeta" (package "o.a.c.m.special");. Fixes MATH-1067. Thanks to Florian Erhard. |
erans |
|
Refactoring of curve fitters (package "o.a.c.m.fitting"). Fixes MATH-1014. |
erans |
|
Added possibility to retrieve the best found solution of the "SimplexSolver" in case
the iteration limit has been reached. The "optimize(OptimizationData...)" method now
supports a "SolutionCallback" which provides access to the best solution if
a feasible solution could be found (phase 2 of the Two-Phase simplex method has been reached). Fixes MATH-970. |
tn |
|
Added new class "ClusterEvaluator" to evaluate the result of a clustering algorithm
and refactored existing evaluation code in "MultiKMeansPlusPlusClusterer"
into separate class "SumOfClusterVariances". Fixes MATH-1031. Thanks to Thorsten Schäfer. |
tn |
|
Added InsufficientDataException. Fixes MATH-1061. |
psteitz |
|
Fixed unintended integer division error in PoissonDistribution sampling method. Fixes MATH-1056. Thanks to Sean Owen. |
psteitz |
|
Fixed failing unit tests for "BOBYQAOptimizer" when executed with a Oracle/Sun JVM 1.5. Fixes MATH-1057. |
tn |
|
A call to "KalmanFilter#correct(...)" may have resulted in "NonSymmetricMatrixException"
as the internally used matrix inversion method was using a too strict symmetry check. Fixes MATH-1062. |
tn |
|
Precision improvements (for small values of the argument) in "Beta" function
and in "LogNormalDistribution" and "WeibullDistribution". Fixes MATH-1058. Thanks to Sean Owen. |
erans |
|
Fixed some invalid links inside javadoc and added missing deprecated annotations. Fixes MATH-1055. Thanks to Sean Owen. |
tn |
|
Added a graphical overview of available continuous distributions to the userguide. Fixes MATH-983. |
tn |
|
Added Kendall's tau correlation (KendallsCorrelation). Fixes MATH-1051. Thanks to Matt Adereth,devl. |
tn |
|
"EigenDecomposition" may have failed to compute the decomposition for certain
non-symmetric matrices. Port of the respective bugfix in Jama-1.0.3. Fixes MATH-1051. |
tn |
|
Check for overflow in methods "pow" (class "o.a.c.m.util.ArithmeticUtils"). Fixes MATH-1047. |
erans |
|
"EigenDecomposition": Using tolerance for detecting whether a matrix is singular. Fixes MATH-1045. Thanks to Sean Owen. |
erans |
|
Added SparseGradient to deal efficiently with first derivatives when the number
of variables is very large but most computations depend only on a few of the
variables. Fixes MATH-1036. Thanks to Ajo Fod. |
luc |
|
Added logDensity methods to AbstractReal/IntegerDistribution with naive default
implementations and improved implementations for some current distributions. Fixes MATH-1039. Thanks to Aleksei Dievskii. |
psteitz |
|
Added ConfidenceInterval class and BinomialConfidenceInterval providing several
estimators for confidence intervals for binomial probabilities. Fixes MATH-1038. Thanks to Thorsten Schäfer. |
psteitz |
|
Simplified and improved performance of "ArithmeticUtils#addAndCheck(long, long)". Fixes MATH-1035. Thanks to derphead. |
tn |
|
Added new methods to compute the inverse of a matrix to "DiagonalMatrix"
and "MatrixUtils". Fixes MATH-1004. Thanks to Ajo Fod. |
tn |
|
The "BigFraction" constructor will throw a "FractionConversionException"
also in case negative values are provided which exceed the allowed range
(+/- Integer.MAX_VALUE). Fixes MATH-1029. |
tn |
|
"Pair": added factory method and "toString" method. Fixes MATH-1041. Thanks to Sean Owen. |
erans |
|
"AbstractUnivariateStatistic.test(...)" methods have uses outside subclasses;
implementation moved to MathArrays.verifyValues(...). Fixes MATH-1002. |
sebb |
|
The "KalmanFilter" wrongly enforced a column dimension of 1 for
the provided control and measurement noise matrix. Fixes MATH-1033. Thanks to Yuan Qu. |
tn |
|
Fix a typo in the test class of "GeometricDistribution" and ensure that a meaningful
tolerance value is used when comparing test results with expected values. Fixes MATH-1037. Thanks to Aleksei Dievskii. |
tn |
|
Added exact binomial test implementation. Fixes MATH-1034. Thanks to Thorsten Schäfer. |
psteitz |
|
Added overloaded constructors for subclasses of "RealDistribution" implementations
which do not require an explicit "inverseCumulativeAccuracy". The default accuracy will
be used instead. Fixes MATH-1018. Thanks to Ajo Fod. |
tn |
|
Added overloaded methods for "Frequency#incrementValue(Comparable, long)" with
int, long and char primitive arguments. Fixes MATH-1001. Thanks to sebb. |
tn |
|
Added a section to the userguide for the new package o.a.c.m.ml with an
overview of available clustering algorithms and a code example. Fixes MATH-1030. Thanks to Thorsten Schäfer. |
tn |
|
Creating a "Fraction" or "BigFraction" object with a maxDenominator parameter
does not throw a "FractionConversionException" anymore in case the value is
very close to fraction. Fixes MATH-996. Thanks to Tim Allison. |
tn |
|
Added new distance metric "EarthMoversDistance". Fixes MATH-1028. Thanks to Thorsten Schäfer. |
tn |
|
Improve performance of "DiagonalMatrix#preMultiply(RealVector)". Fixes MATH-999. Thanks to Ajo Fod. |
tn |
|
Added CombinatoricsUtils to the util package, moving binomial
coefficients, factorials and Stirling numbers there and adding
a combinations iterator. Fixes MATH-1025. |
psteitz |
|
"PolynomialSplineFunction": added method "isValidPoint" that
checks whether a point is within the interpolation range. Fixes MATH-991. |
erans |
|
"BicubicSplineInterpolatingFunction": added method "isValidPoint" that
checks whether a point is within the interpolation range. Fixes MATH-989. |
erans |
|
Fixed overflow in "HypergeometricDistribution". Fixes MATH-1021. Thanks to Brian Bloniarz. |
erans |
|
Fixed "nextPermutation" method (in "o.a.c.m.random.RandomDataGenerator").
This bug does not affect applications using a previous version of
Commons Math. Fixes MATH-1020. |
erans |
|
Buggy (private) method "shuffle" in "o.a.c.m.random.RandomDataGenerator"
superseded by "MathArrays.shuffle" (cf. MATH-1010). Fixes MATH-1019. |
erans |
|
Utility to shuffle an array. Fixes MATH-1010. |
erans |
|
Created "RandomGeneratorFactory" (package "o.a.c.m.random") to reduce
code duplication in "RandomDataGenerator". Fixes MATH-1012. |
erans |
|
Created package ("o.a.c.m.fitting.leastsquares") for least-squares
fitting, with implementations of "LevenbergMarquardtOptimizer" and
"GaussNewtonOptimizer" adapted to a new ("fluent") API. Fixes MATH-1008. |
erans |
|
Improved implementation of "sample" method of "UniformIntegerDistribution". Fixes MATH-1011. |
erans |
|
Add mode function to StatUtils class. Fixes MATH-1007. |
sebb |
|
Enabled LaTeX expressions in javadoc and site docs via MathJax. Fixes MATH-1006. |
psteitz |
|
Add mode function to Frequency class. Fixes MATH-1000. |
sebb |
|
Fixed "MathArrays.linearCombination" when array length is 1. Fixes MATH-1005. Thanks to Roman Werpachowski. |
erans |
|
Implemented Gauss-Hermite quadrature scheme (in package
"o.a.c.m.analysis.integration.gauss"). Fixes MATH-997. |
erans |
|
Documented limitation of "IterativeLegendreGaussIntegrator" (added
warning about potential wrong usage). Fixes MATH-995. |
erans |
|
In "GaussNewtonOptimizer", check for convergence before updating the
parameters estimation for the next iteration. Fixes MATH-993. |
erans |
|
Added midpoint integration method. Fixes MATH-967. Thanks to Oleksandr Kornieiev. |
luc |
|
Fixed NullPointerException in 2D and 3D sub-line intersections. Fixes MATH-988. Thanks to Andreas Huber. |
luc |
|
Added append method to SimpleRegression, making this class map/reducible. Fixes MATH-987. Thanks to Ajo Fod. |
psteitz |
|
Added append method to StorelessCovariance, making this class map/reducible. Fixes MATH-978. Thanks to Ajo Fod. |
psteitz |
|
Added method "MathArrays#convolve(double[], double[])" to compute the
discrete, linear convolution of two sequences. Fixes MATH-851. Thanks to Clemens Novak. |
tn |
|
Added low-discrepancy random generator "HaltonSequenceGenerator". Fixes MATH-977. |
tn |
|
Added low-discrepancy random generator "SobolSequenceGenerator". Fixes MATH-826. Thanks to Sam Halliday. |
tn |
|
Added "GeometricDistribution" to "o.a.c.m.distribution" package. Fixes MATH-973. Thanks to Mauro Tortonesi. |
tn |
|
Added "ParetoDistribution" to "o.a.c.m.distribution" package. Fixes MATH-968. Thanks to Alex Gryzlov. |
tn |
|
Added clarification to the javadoc of "VectorFormat" and derived classes
in case "," is used as a separator. Fixes MATH-962. |
tn |
|
Added "FuzzyKMeansClusterer" to "o.a.c.m.ml.clustering" package. Fixes MATH-898. |
tn |
|
Fixed inconsistent dimensions preventing use of secondary states
in ODE events. Fixes MATH-965. |
luc |
Release 3.2 – 2013-04-06
| Type |
Changes |
By |
|
Fixed wrong array dimensions in secondary equations handling in some cases. Fixes MATH-961. |
luc |
|
Fixed missing side effects of secondary equations on main state in
Ordinary Differential Equations integration. Fixes MATH-960. |
luc |
|
Fixed inverse cumulative probability for uniform distribution. Fixes MATH-957. Thanks to Evan Ward. |
luc |
|
All contents of package "o.a.c.m.stat.clustering" refactored into
new package "o.a.c.m.ml.clustering" and added support for additional
distance measures in package "o.a.c.m.ml.distance": "CanberraDistance",
"ChebyshevDistance", "EuclideanDistance" and "ManhattanDistance". Fixes MATH-917,MATH-918,MATH-919,MATH-920. Thanks to Reid Hochstedler. |
tn |
|
"SpearmansCorrelation" now works correctly in case of a provided
"NaturalRanking" with a "NaNStrategy.REMOVED" strategy and the input
data contains NaN values. From version 4.0 onwards this strategy will
not be supported anymore. Fixes MATH-891. |
tn |
|
Replaced hard-coded numbers in "LevenbergMarquardtOptimizer". Fixes MATH-956. |
erans |
|
Fixed loading of test file when path contains a space. Fixes MATH-955. Thanks to Evan Ward. |
luc |
|
Improved speed of FastMath.abs methods for all signatures, by removing branching. Fixes MATH-954. Thanks to Charles Cooper. |
luc |
|
Improved speed of several FastMath methods. Fixes MATH-953. Thanks to Charles Cooper. |
luc |
|
Fixed Complex.reciprocal() for zero argument. Fixes MATH-934. |
luc |
|
Improved speed of FastMath copysign methods. Fixes MATH-951. Thanks to Charles Cooper. |
luc |
|
Added Multivariate Normal Mixture Model Fitting by Expectation Maximization. Fixes MATH-817. Thanks to Jared Becksfort. |
erans |
|
AbstractRealMatrix will now check for rectangular input arrays in
its copySubMatrix methods. Fixes MATH-862. |
tn |
|
Increment iteration counter in optimization algorithms. Fixes MATH-949. |
erans |
|
Added a way to trigger only increasing or decreasing events in ODE integration. Fixes MATH-811. |
luc |
|
Fixed missing update in ODE event handlers, when a RESET_STATE is triggered. Fixes MATH-950. |
luc |
|
Made EmpiricalDisribution smoothing kernel pluggable. Fixes MATH-671. |
psteitz |
|
Added array-scaling methods to MathArrays. Fixes MATH-946. Thanks to Jared Becksfort. |
psteitz |
|
Allow direct use of SummaryStatistics in one-way ANOVA. Fixes MATH-877. Thanks to Peter Andrews. |
luc |
|
Fixed infinite loop when NaN occurs in singular value decomposition. Fixes MATH-947. |
luc |
|
Added the Lévy distribution. Fixes MATH-460. Thanks to Andrew Waterman. |
luc |
|
Normal distribution now uses a direct implementation of the
inverse error function to compute inverse cumulative probability
instead of relying on a numerical solver. This is much faster,
more accurate and does not need convergence threshold. |
luc |
|
Implementations for inverse error function and inverse complementary
error functions have been added. Fixes MATH-948. |
luc |
|
Extended ranges for FastMath performance tests. Fixes MATH-580. |
luc |
|
Finalized implementation of diagonal matrix. Fixes MATH-925. |
luc |
|
Added rank revealing QR decomposition. Fixes MATH-630. Thanks to Christopher Nix. |
luc |
|
ArrayFieldVector can now be constructed from any FieldVector. Fixes MATH-570. Thanks to Arne Plöse. |
luc |
|
Improved checking of null vector elements. Fixes MATH-861. Thanks to Sébastien Brisard. |
luc |
|
Added utilities for prime numbers. Fixes MATH-845. Thanks to Sébastien Riou. |
luc |
|
Fixed generation of long random numbers between two bounds. Fixes MATH-936. |
luc |
|
Fixed creation of generic array. Fixes MATH-942. Thanks to Piotr Wydrych. |
luc |
|
Check bounds in multi-start vector optimizers. Fixes MATH-914. |
luc |
|
Added discrete distributions. Fixes MATH-941. Thanks to Piotr Wydrych. |
luc |
|
Fixed abstract test class naming that broke ant builds. Fixes MATH-940. Thanks to Piotr Wydrych. |
luc |
|
Allow covariance to be computed for one-dimensional variables. Fixes MATH-939. Thanks to Piotr Wydrych. |
luc |
|
Fixed accuracy of 3D Line.revert(). Fixes MATH-938. |
luc |
|
Improved javadoc to explain how switching functions should
behave across events in ODE events detection. Fixes MATH-937. |
luc |
|
Added Hermite interpolator for RealFieldElement instances. |
luc |
|
Added RealFieldElement interface to represent anything that is
real number like, implemented by both Decimal64, Dfp and DerivativeStructure. |
luc |
|
Added partial derivatives computation for 3D vectors and rotations. |
luc |
|
Fixed DerivativeStructure.atan2 for special cases when both arguments are +/-0. Fixes MATH-935. |
luc |
|
Added accurate linear combination of DerivativeStructure instances,
avoiding cancellation. |
luc |
|
Throw "MathUnsupportedOperationException" from optimizers that do
not support constraints (previous behaviour was to silently ignore
the "SimpleBounds" argument). Fixes MATH-933. |
erans |
|
Added conversion of gradients and Hessians from spherical to Cartesian
coordinates in 3D. |
luc |
|
Greater efficiency in "UnitSphereRandomVectorGenerator". Fixes MATH-931. Thanks to Sean Owen. |
erans |
|
Improved class javadoc wrt convergence criteria and added
additional constructors to override the default epsilon and cut-off
values in class "SimplexSolver". Fixes MATH-930. |
tn |
|
Fixed truncated value in "MultivariateNormalDistribution". Fixes MATH-929. Thanks to Piotr Wydrych. |
erans |
|
Made "BitStreamGenerator" implement the "Serializable" interface. Fixes MATH-927. Thanks to Dennis Hendriks. |
erans |
Release 3.1.1 – 2013-01-14
| Type |
Changes |
By |
|
Added a (minimal) "DiagonalMatrix" implementation, such that the
case of a large number of uncorrelated observations is handled
efficiently. Fixes MATH-924. |
erans |
Release 3.1 – 2012-12-23
| Type |
Changes |
By |
|
All contents of package "o.a.c.m.optimization" refactored into
new packages "o.a.c.m.optimization" and "o.a.c.m.fitting". Fixes MATH-874. |
erans |
|
Added methods to EmpiricalDistribution to implement the RealDistribution
interface. Fixes MATH-672. |
psteitz |
|
DBSCAN clustering algorithm (in package "o.a.c.m.stat.clustering"). Fixes MATH-897. Thanks to Reid Hochstedler. |
tn |
|
Added element-by-element addition, subtraction, multiplication and division
(in class "o.a.c.m.util.MathArrays"). Fixes MATH-910. |
erans |
|
Fixed "pow" method in class "FastMath". Fixes MATH-904. Thanks to Jeff Hain. |
erans |
|
Created a "maximum number of iterations" stopping criterion in the
convergence checkers (package "o.a.c.m.optimization") that allows the
optimizers to return the "current best point" even if the convergence
criteria are not met. Fixes MATH-902. Thanks to Bruce A. Johnson. |
erans |
|
Fixed overflow in "sinh" and "cosh" methods in class "FastMath". Fixes MATH-905. Thanks to Jeff Hain. |
erans |
|
Accuracy improvements of Gamma.logGamma, and implementation of
Gamma.gamma. Both new implementations are based on the NSWC
Library of Mathematical Functions. Fixes MATH-849. |
celestin |
|
New constructor in the custom checker classes (package
"o.a.c.m.optimization") for passing the number of iterations
after which the "convergence test" will return true.
This allows an algorithm to return the best solution found (after
the user-defined number of iterations) even if it does not meet the
other convergence criteria. Fixes MATH-902. |
erans |
|
Use "NaNStrategy#FAILED" as default strategy in "NaturalRanking". Fixes MATH-906. Thanks to Patrick Meyer. |
tn |
|
Added a new "SynchronizedRandomGenerator" that wraps another
"RandomGenerator" with all methods being synchronized, thus
rendering the code thread-safe (at some efficiency cost). Fixes MATH-899. |
erans |
|
Add new "NaNStrategy": FAILED, used in "RankingAlgorithm" implementations.
Any encountered input value that succeeds a "Double#isNaN" check, results in a
"NotANumberException". Fixes MATH-893. Thanks to Patrick Meyer. |
tn |
|
Add new constructor to "SpearmansCorrelation" class which allows to specify the
"RankingAlgorithm" to be used. Fixes MATH-892. |
tn |
|
Fixed naming inconsistencies between Interval and IntervalsSet classes. Fixes MATH-890. |
luc |
|
Added a method to check points in the Interval class, with a tolerance for boundary. Fixes MATH-889. |
luc |
|
Added G-test statistics. Fixes MATH-878. Thanks to Radoslav Tsvetkov. |
psteitz |
|
New "getSquareRoot" method in class "EigenDecomposition" (package
"o.a.c.m.linear"). Fixes MATH-883. |
erans |
|
Added "isSymmetric" and "checkSymmetric" in "MatrixUtils" (package
"o.a.c.m.linear"). Fixes MATH-884. |
erans |
|
Moved private array argument validation methods from ChiSquareTest to MathArrays. Fixes MATH-885. |
psteitz |
|
New class for generic multivariate mixture model distributions. Fixes MATH-816. Thanks to Jared Becksfort. |
erans |
|
Use getter/setter methods of super class for access to field "windowSize" in
"ListUnivariateImpl". Fixes MATH-759. Thanks to sebb. |
tn |
|
Improved construction of polygons with an additional constructor, more robust numerically. Fixes MATH-880. |
luc |
|
Added new methods "merge(Frequency)", "merge(Collection<Frequency>)",
"incrementValue(Comparable<?>, long)" and "entrySetIterator()" to the "Frequency" class. Fixes MATH-474. Thanks to Dan Checkoway. |
tn |
|
Allow unlimited input values for "Dfp#multiply(int)". Fixes MATH-778. Thanks to Sébastien Brisard. |
tn |
|
Added distance to point to 2D Line and Segment. Fixes MATH-641. Thanks to Curtis Jensen. |
luc |
|
"PowellOptimizer" (package "o.a.c.m.optimization.direct") uses
"BrentOptimizer" as its internal line search optimizer. The fix
forces the convergence criterion of "BrentOptimizer" to use
function values (instead of domain values). Fixes MATH-783. |
erans |
|
Numerical accuracy problems arose in "CMAESOptimizer" (in package
"o.a.c.m.optimization.direct") when large finite boundaries were
specified, because the interval of allowed values was mapped to
[0, 1]. This mapping was not necessary and its removal allows
finite and infinite boundaries to be used together. Fixes MATH-865,MATH-867,MATH-868. Thanks to Nikolaus Hansen, Frank Hess. |
erans |
|
Fixed some issues in nth root derivatives at 0. |
luc |
|
Fixed transformation to a Schur matrix for certain input matrices. Fixes MATH-848. |
tn |
|
Added matrix "block inversion" (in "o.a.c.m.linear.MatrixUtils"). Fixes MATH-860. |
erans |
|
"CMAESOptimizer": Solution was not constrained to lie within the
provided boundaries. Fixes MATH-864. Thanks to Frank Hess. |
erans |
|
New "Quaternion" class (package "o.a.c.m.complex"). Fixes MATH-863. Thanks to Julien Anxionnat. |
erans |
|
Added method to test for floating-point numbers equality with a
relative tolerance (class "o.a.c.m.util.Precision"). Fixes MATH-866. Thanks to Yannick Tanguy. |
erans |
|
Deprecated "FieldVector#getData()" in favor of "toArray()". Fixes MATH-666. |
tn |
|
Fixed an error in rectangular Cholesky decomposition. Fixes MATH-789. |
luc |
|
Clarified definition of isSupportXxxBoundInclusive in RealDistribution
interface, made code consistent with the definition, and deprecated
these methods, marking for removal in 4.0. Fixes MATH-859. |
psteitz |
|
Performance improvement in computation of the greatest common divisor
(in class "o.a.c.m.util.ArithmeticUtils"). Fixes MATH-841. Thanks to Sebastien Riou. |
erans |
|
Added a check so that the returned point will always be the best one. Fixes MATH-855. |
erans |
|
Added a NewtonRaphsonSolver that uses the new differentiation package
to define the function to solve. This class is intended to replace the
former NewtonSolver which is deprecated. |
luc |
|
Added RandomDataGenerator to replace RandomDataImpl and deprecated
RandomData interface and RandomDataImpl class. Deprecated
nextInversionDeviate methods from RandomDataImpl class. Ensured that
all nextXxx methods in RandomDataImpl/RandomDataGenerator use the
configured RandomGenerator. Fixes MATH-850. |
psteitz |
|
Generate an exception for rare ill-conditioned cases in "HarmonicFitter"
guessing procedure (package "o.a.c.m.optimization.fitting"). Fixes MATH-844. |
erans |
|
New interface for multivariate distributions.
Added multivariate normal distribution. Fixes MATH-815. Thanks to Jared Becksfort. |
erans |
|
Added a utility method to compute Stirling numbers of the second kind. |
luc |
|
Added a new package dealing with differentials, for one or more free
parameters and derivation order 1 or higher. |
luc |
|
Added additional crossover policies: "CycleCrossover", "NPointCrossover",
"OrderedCrossover" and "UniformCrossover". Fixes MATH-777. Thanks to Reid Hochstedler. |
tn |
|
Improved numerical stability of "SimplexSolver" by introducing Bland's rule
to prevent cycling and a cutoff threshold to zero out very small values. Fixes MATH-828. |
tn |
|
Fixed overflow detection for negative values in constructor of class "Fraction". Fixes MATH-836. Thanks to Baste Nesse Buanes. |
tn |
|
Fixed overflow in method "percentageValue" in class "Fraction". Fixes MATH-835. Thanks to Baste Nesse Buanes. |
erans |
|
Raised (to 10) the default number of fractional digits to print out. Fixes MATH-622. |
erans |
|
Removed duplicate code. Fixes MATH-762. |
erans |
|
Added a new "RealMatrixFormat" class for input/output of RealMatrix instances.
Default formatter instances for commons-math and octave have been added to
"MatrixUtils". Fixes MATH-831. |
tn |
|
New "IterativeLegendreGaussIntegrator" that performs the same automatic
subdivision of the integration interval as "LegendreGaussIntegrator",
but uses the classes from package "o.a.c.m.analysis.integration.gauss"
to perform the Gauss integration on the sub-interval.
Deprecated "LegendreGaussIntegrator". Fixes MATH-827. |
erans |
|
Improve performance of quantile evaluation in "Percentile" class for cases
with lots of equal values. Fixes MATH-578. |
tn |
|
New framework for Gauss integration schemes (in package
"o.a.c.m.analysis.integration.gauss").
Gauss-Legendre quadrature rules (of unlimited order) implemented in
double precision, and high precision (using "BigDecimal"). Fixes MATH-797. |
erans |
|
For all distribution classes (in package "o.a.c.m.distribution"), a new
constructor takes a "RandomGenerator" parameter.
The "RandomDataImpl" instance has been superseded by this RNG.
All "sample()" methods have been modified to use this RNG instead of
delegating to the methods in "RandomData". Fixes MATH-764,MATH-823. |
erans |
|
Added support for real asymmetric matrices to "EigenDecomposition". Fixes MATH-235. |
tn |
|
Re-instated methods to find all complex roots of a polynomial (class
"LaguerreSolver" in package "o.a.c.m.analysis.solvers"). Fixes MATH-768. |
erans |
|
Added accessors to the "Pair" class (package "o.a.c.m.util"). Fixes MATH-810. |
erans |
|
Added new constructors in "EigenDecomposition" and deprecated two constructors
with unused parameters. Fixes MATH-822. Thanks to Jared Becksfort. |
tn |
|
Added overridden method in "PolynomialFitter" (package
"o.a.c.m.optimization.fitting") to limit the number of evaluations. Fixes MATH-798. |
erans |
|
Added a new constructor to o.a.c.m.utils.IterationManager, allowing
for the specification of a callback function in case the maximum
number of iteration is reached. Fixes MATH-807. |
celestin |
|
A new HermiteInterpolator class allows interpolation of vector-valued
functions using both values and derivatives of the function at sample
points. |
luc |
|
Parameterized "CurveFitter" class (package "o.a.c.m.optimization.fitting")
with the type of the fitting function. Updated subclasses "PolynomialFitter",
"HarmonicFitter", "GaussianFitter". Fixes MATH-804. |
erans |
|
Fixed a problem when building rotations from two pairs of vectors. In very rare cases,
due to numerical inaccuracies the computed quaternion was not normalized (some examples
went as high as 1.0e8) and even after normalization, the quaternion was plain wrong. Fixes MATH-801. |
luc |
|
Removed unused fields LocalizedFormats.ALPHA and LocalizedFormats.BETA. This is
an acceptable compatibility break, as these fields are only meant for internal use. Fixes MATH-796. |
celestin |
|
Fix computation of upperCumulativeProbability in "HypergeometricDistribution" and
cleanup of duplicate probability mass function. Fixes MATH-644. Thanks to marzieh. |
tn |
|
In GammaDistribution, deprecated getAlpha() and getBeta(). Replaced with
getShape() and getScale(), respectively. Fixes MATH-791. |
celestin |
|
Use inline computation for OrderedTuple hash code. Fixes MATH-793. Thanks to Sebb. |
luc |
|
Use modified Lentz-Thompson algorithm for continued fraction evaluation to avoid
underflows. Fixes MATH-718. |
tn |
|
Fixed a wrong assumption on BSP tree attributes when boundary collapses to a too
small polygon at a non-leaf node. Fixes MATH-780. |
luc |
|
Put serialization back for PointValuePair and PointVectorValuePair. Fixes MATH-787. |
luc |
|
Avoid superfluous null check when using iterators in RealVector and ArrayRealVector. Fixes MATH-627. Thanks to Arne Plöse. |
tn |
|
Use epsilon instead of ulp in floating-point comparison when dropping columns after
phase 1 in SimplexSolver. Fixes MATH-781. Thanks to Scheiber Ernő. |
tn |
|
Added a workaround for an OpenJDK issue on sparc solaris with too small constants. Fixes MATH-721. |
luc |
|
Fixed ListPopulation#iterator to return an unmodifiable iterator. Fixes MATH-779. Thanks to Reid Hochstedler. |
tn |
|
Cleanup of ListPopulation to consistently enforce the population limit. Fixes MATH-775. Thanks to Reid Hochstedler. |
tn |
|
Use same range check in constructor for ElitisticListPopulation as in corresponding setter. Fixes MATH-776. Thanks to Reid Hochstedler. |
tn |
|
Fixed unbalanced use of code tags in javadoc of several classes. Fixes MATH-767. Thanks to Dennis Hendriks. |
tn |
|
Added class FixedElapsedTime (new StoppingCondition for evolution of generations) to genetics package. Fixes MATH-773. Thanks to Reid Hochstedler. |
tn |
|
Added classes Decimal64 and Decimal64Field, which are wrapper classes around primitive doubles.
These classes implement FieldElement and Field, respectively. Fixes MATH-756. |
celestin |
Release 3.0 – 2012-03-07
| Type |
Changes |
By |
|
Added statistical hypothesis tests "MannWhitneyUTest" and
"WilcoxonSignedRankTest". Fixes MATH-431. |
mikl |
|
Classes "CMAESOptimizer" and "BOBYQAOptimizer" inherit from
"BaseAbstractMultivariateSimpleBoundsOptimizer" (in package
"o.a.c.m.optimization.direct"). Fixes MATH-698. |
erans |
|
Added pre-computed arrays to speed up initial loading time for FastMath. Fixes MATH-650. |
sebb |
|
Resources for error messages translations have been moved out of META-INF
folder in the jar, to avoid interferences with some build systems. |
luc |
|
Fixed "doubleValue" and "floatValue" method in "BigFraction" when
numerator and denominator are larger than the range of the
corresponding primitive type. Fixes MATH-744. Thanks to Thundre. |
erans |
|
Removed "MathException" (from package "o.a.c.math"). Fixes MATH-488. |
erans |
|
Removed "MathRuntimeException" (from package "o.a.c.math"). Fixes MATH-459. |
erans |
|
Merged interface and implementation of statistical tests in
o.a.c.m.stat.inference package. Fixes MATH-739. |
tn |
|
Merged interface and implementation of EmpiricalDistribution. Fixes MATH-670. |
tn |
|
Relaxed test for equality in UnivariateStatisticAbstractTest. Fixes MATH-588. |
tn |
|
Modified the genetics package to use localized exception messages. Fixes MATH-575. |
tn |
|
Fixed a faulty test for zero in TridiagonalTransformer. Fixes MATH-652. Thanks to Greg Sterijevski. |
tn |
|
Changed algorithm in computation of the covariance matrix in
"AbstractLeastSquares" (package "optimization.general"), from
"LUDecomposition" to "QRDecomposition". Fixes MATH-664. |
erans |
|
Fixed rounding error in RandomDataImpl nextInt, nextLong methods causing lower
endpoints to be excluded when negative. Also improved robustness of nextUniform
for extreme values and changed its contract to throw IAE when provided bounds
are infinite or NaN. Fixes MATH-724. Thanks to Dennis Hendriks. |
psteitz |
|
Fixed "offset by one" bug in "BOBYQAOptimizer". Fixes MATH-728. Thanks to Bruce A. Johnson. |
erans |
|
Check first step size in embedded Runge-Kutta integrators, and truncate it if needed. Fixes MATH-727. |
luc |
|
Modified setSeed methods in Bitstream generators (MersenneTwister and Well
generators) to clear the cache of normal deviates used by nextGaussian. Fixes MATH-723. |
psteitz |
|
Fixed bracketing interval balancing in BracketingNthOrderBrentSolver. Fixes MATH-716. |
luc |
|
Removed unused or duplicate utility methods from "MathUtils".
Math functions with "double" arguments were moved to class "FastMath". Fixes MATH-690. |
erans |
|
Broke up bloated "MathUtils" class into "MathArrays", "Precision",
"ArithmeticUtils" classes. Fixes MATH-689. |
erans |
|
Fixed array indexing error in Variance evaluate method for
computing the weighted variance of an array segment. Fixes MATH-704. Thanks to Thomas Neidhart. |
psteitz |
|
Fixed case of unconstrained variables that still occur in the objective function
in simplex solver. Fixes MATH-713. Thanks to Thomas Neidhart. |
luc |
|
The fast cryptographically secure pseudorandom number generator ISAAC has been added. Fixes MATH-710. Thanks to Eldar Agalarov. |
luc |
|
The reset method in StepHandler interface has been renamed init and is provided
more information on the integration by the calling integrator. A similar init method
has been added to the EventHandler interface. Fixes MATH-714. |
luc |
|
Improved accuracy of Runge-Kutta based step interpolators near step start. Fixes MATH-705. |
luc |
|
Fixed errors in SummaryStatistics addValue causing variance, mean, or
geometric mean statistics not to be updated if they have been overridden
using instances of commons-math supplied implementations. Fixes MATH-691. |
psteitz |
|
Removed First, Third, Fourth moments from the public API.
These internally used statistics have non-standard definitions.
The classes remain, but now have package scope. Fixes MATH-694. |
psteitz |
|
Added support for population variance in StatUtils, SummaryStatistics
and DescriptiveStatistics and clarified javadoc to make it clear that
'variance' means sample variance. Fixes MATH-693. |
psteitz |
|
Fixed BigFraction percentage method which did not work at all. Fixes MATH-709. |
luc |
|
Added interface and abstract class for supporting optimizers classes
that can take simple constraints into account. Fixes MATH-697. |
erans |
|
Fixed a bad interaction between step handlers and event handlers in
ODE integrators. Thanks to MATH-706. |
luc |
|
Added array constructor and getter for Vector2D and Vector3D. Thanks to Jan Kotek. |
luc |
|
Added applyTo and applyInverseTo methods in the Rotation class that
handle directly arrays instead of Vector3D instances. Thanks to Jan Kotek. |
luc |
|
Added adapters for simple bound constraints optimization that can be
used for all direct optimization methods, including the ones that do not
support constraints by themselves. Fixes MATH-196. |
luc |
|
CMA-ES optimizer input sigma is now consistent with boundaries range units. Fixes MATH-702. |
luc |
|
Added stable random generator based on Chambers-Mallows-Stuck method. Fixes MATH-462. Thanks to Pavel Ryzhof. |
psteitz |
|
Changed the default seed used for RandomDataImpl, AbstractWell and MersenneTwister
PRNGs to add the system identity hash code of the instance to the current system
time, so generators initialized with default seeds within system clock resolution
will generate different sequences. Changed the default non-secure generator used
by RandomDataImpl to Well19937c. Fixes MATH-701. |
psteitz |
|
Fixed an event resetting issue in ODE. Fixes MATH-695. |
luc |
|
Default implementation for "addToEntry" and "multiplyEntry" in
"AbstractRealMatrix". Fixes MATH-696. |
erans |
|
Method "addToEntry" in "RealVector". Fixes MATH-685. |
erans |
|
Replaced temporary matrices and entry mutators with double[][] arrays to speed computation
in loops within QRDecomposition, Bi- and TriDiagonalTransformer implementations. Fixes MATH-612. Thanks to Christopher Nix. |
psteitz |
|
Fixed an integer overflow in OpenMapRealMatrix. Fixes MATH-679. Thanks to Christopher Berner. |
luc |
|
"FastMath": Use constant fields instead of recomputing them at method
call. Fixes MATH-688. |
erans |
|
Added Jacobi polynomials. Fixes MATH-687. Thanks to Romain di Costanzo. |
luc |
|
Added "shift" method to compute the coefficients of a new polynomial
whose values are the same as those of another polynomial but computed
at a shifted point. Fixes MATH-683. Thanks to Romain di Costanzo. |
erans |
|
Faster "multiply" method in "Array2DRowRealMatrix". Code inspired
from the Jama project. Fixes MATH-676. |
erans |
|
Replaced package.html with package-info.java for package documentation. Fixes MATH-445. |
luc |
|
Added a getRuntimeClass method to the Field interface allowing to use a
complete hierarchy of fields sharing a common interface. Fixes MATH-284. Thanks to Klaus Hartlage. |
luc |
|
The last remaining uses of OptimizationException have been replaced by unchecked
exceptions (UnboundSolutionException, NoFeasibleSolutionException,
MaxCountExceededException ...). Fixes MATH-457. |
luc |
|
The checked ConvergenceException has been replaced by an unchecked ConvergenceException. Fixes MATH-487. |
luc |
|
ODE step interpolation with Jacobians is now fully merged with
classical step interpolation. Fixes MATH-381. Thanks to Pascal Parraud. |
luc |
|
Completely revamped the computation of Jacobians in ODE. This computation is now
included in the mainstream class hierarchy, not in a separate package anymore,
and it allows adding other types of equations to a main ODE, not only variational
equations for Jacobians computation. Fixes MATH-380. Thanks to Pascal Parraud. |
luc |
|
SimpleRegression implements UpdatingMultipleLinearRegression interface. Fixes MATH-607. |
gregs |
|
Added isMonotone methods in MathUtils. Optimized checkOrder method. Fixes MATH-675. |
gregs |
|
In class "AbstractLeastSquaresOptimizer": Allow to specify a singularity
threshold in call to "getCovariances" method. Fixes MATH-664. |
erans |
|
Added the ability to suppress the estimation of the intercept in SimpleRegression. Fixes MATH-649. |
gregs |
|
Dead code in FastMath.pow(double, double) and some improvement in test coverage. Fixes MATH-658. Thanks to Yannick TANGUY. |
sebb |
|
Removed "getData()" method from "RealVector" as it was redundant with
"toArray()". Fixes MATH-663. |
erans |
|
Removed completely MathUserException. Fixes MATH-195. |
luc |
|
Use the refactored exceptions framework for ODE. Fixes MATH-488. |
luc |
|
Added a getter to allow retrieving the exception related to an exception context
provider. |
luc |
|
Added erf(double,double) to Erf and used this to improve tail probability
accuracy in NormalDistributionImpl. Fixes MATH-364. Thanks to Christian Winter. |
psteitz |
|
Enabled reseeding of the random generators used by EmpiricalDistributionImpl
and ValueServer. Modified ValueServer to pass its RandomData instance to
the EmpiricalDistributionImpl that it creates when used in DIGEST_MODE, so
reseeding ValueServer works as expected. Fixes MATH-654. |
psteitz |
|
Renamed "AbstractRealVector" to "RealVector". The interface was removed
in favour of its unique (abstract) implementation. Also removed several
methods with double[] arguments from AbstractRealVector. Fixes MATH-653. |
erans |
|
Unmodifiable view of a "RealVector". Fixes MATH-646. Thanks to Sébastien Brisard. |
erans |
|
Refactored integration API for consistency with solvers API. Now the main convergence
parameters are set in the constructor and remain fixed. Fixes MATH-501. |
luc |
|
Added a maximal number of function evaluations to the integration method, similar
to what is done in the solvers API. Fixes MATH-464. |
luc |
|
Added storeless covariance implementation. Fixes MATH-449. Thanks to Patrick Meyer. |
psteitz |
|
Eliminated extraneous constructor from SimpleRegression. Fixes MATH-648. |
psteitz |
|
Eliminated pluggability of ChiSquaredDistribution used by ChiSquaredDistributionTest. Fixes MATH-506. |
psteitz |
|
Made RandomGenerator configurable and reseedable in EmpiricalDistributionImpl. Fixes MATH-634. |
psteitz |
|
Added a 3D SubLine class. Fixes MATH-593. |
luc |
|
Fixed exceptions generated by "ebeMultiply" and "ebeDivide" in "OpenMapRealVector". Fixes MATH-645. |
erans |
|
In "SingularValueDecompositionImpl", added accessor for the inverse of the condition number. Fixes MATH-602. Thanks to Greg Serijevski. |
erans |
|
Made pseudo-inverse consistent with rank computation in SingularValueDecompositionImpl. Fixes MATH-601. Thanks to Chris Nix and Greg Serijevski. |
psteitz |
|
Added methods to solve upper and lower triangular systems to MatrixUtils. Fixes MATH-624. Thanks to Greg Sterijevski. |
psteitz |
|
Improved performance of nextInt(int) in BitsStreamGenerator. Fixes MATH-642. |
psteitz |
|
Fixed a wrong detection of rotation axis versus vectors plane in Rotation constructor
using two vectors pairs. Fixes MATH-639. |
luc |
|
Added a few linearCombination utility methods in MathUtils to compute accurately
linear combinations a1.b1 + a2.b2 + ... + an.bn taking great care to compensate
for cancellation effects. This both improves and simplify several methods in
euclidean geometry classes, including linear constructors, dot product and cross
product. |
luc |
|
Fixed bugs in AbstractRandomGenerator nextInt() and nextLong() default
implementations. Prior to the fix for this issue, these methods
generated only positive values. Fixes MATH-640. |
psteitz |
|
Simple benchmark utility (new class "PerfTestUtils" added to test sources in src/test). Fixes MATH-637. |
erans |
|
Added a solver for Dfp-based (i.e. high accuracy) functions. Fixes MATH-636. |
luc |
|
Added a Brent-like solver that has higher (user specified) order and does
bracket selection on the result: BracketingNthOrderBrentSolver. Fixes MATH-635. |
luc |
|
Added a few shortcut methods and predicates to Dfp (abs, isZero,
negativeOrNull, strictlyNegative, positiveOrNull, strictlyPositive). |
luc |
|
"AbstractRealMatrix" inherits from "RealLinearOperator". Fixes MATH-633. Thanks to Sébastien Brisard. |
erans |
|
Linear combination of vectors: "RealVector" interface updated, implemented
in "AbstractRealVector" and "ArrayRealVector". Fixes MATH-613. Thanks to Sébastien Brisard. |
erans |
|
Slightly more efficient implementation of basic operations in
"ArrayRealVector". Fixes MATH-623. Thanks to Arne Plöse. |
erans |
|
Overloaded methods (add, subtract, multiply, divide) to take a "double" parameter
(as a complex number with zero imaginary part).
Code and Javadoc cleanup.
Added "valueOf" methods. Fixes MATH-577. Thanks to Arne Plöse. |
erans |
|
Implemented faster generation of random gamma distributed values with
algorithm from Ahrens and Dieter (1972) for shape < 1 and
Marsaglia and Tsang (2001) otherwise. Fixes MATH-585. |
mikl |
|
Allow discrete events to be detected by ODE solvers also at step start. Fixes MATH-605. Thanks to Dennis Hendriks. |
luc |
|
Rewritten SVD decomposition based on JAMA code. Fixes MATH-327,MATH-383,MATH-465,MATH-583,MATH-611. Thanks to Christopher Nix. |
luc |
|
Complex add javadoc says that if either addend has NaN parts, the result
should be Complex.NaN. Prior to the fix for this issue, NaNs were propagated
only in real and imaginary parts individually. Fixes MATH-618. Thanks to Arne Plose. |
psteitz |
|
Framework for iterative linear solvers. Fixes MATH-581. Thanks to Sébastien Brisard. |
erans |
|
Improved efficiency in RandomDataImpl, LaguerreSolver, FastMath and OutlineExtractor by
moving conditional code into blocks where it is needed. Fixes MATH-609. Thanks to Dave Brosius. |
psteitz |
|
Prevent step normalizer to output twice the last point in MULTIPLES mode. Fixes MATH-603. Thanks to Dennis Hendriks. |
luc |
|
Removed the requiresDenseOutput method from the StepHandler interface. Now integrators always
consider dense output is required and set up the appropriate state interpolators, so step
handlers can rely on them. Fixes MATH-596,MATH-604. |
luc |
|
Modified "SecantSolver" to comply with the original algorithm. Added several
secant-based solvers. Added a way to select the side of the root with bracketing
solvers. Fixes MATH-599. Thanks to Dennis Hendriks. |
erans |
|
Fixed javadoc for ODEIntegrator interface. Fixes MATH-600. |
luc |
|
Extended StepNormalizer with normalization mode and bounds settings. Fixes MATH-595. Thanks to Dennis Hendriks. |
luc |
|
Implemented faster generation of random exponential distributed values with
algorithm from Ahrens and Dieter (1972): Computer methods for sampling
from the exponential and normal distributions. Fixes MATH-597. |
mikl |
|
K-means++ clustering can now run multiple trials. Fixes MATH-548. |
luc |
|
Added a way to compute sub-lines intersections, considering sub-lines either
as open sets or closed sets. Fixes MATH-591. |
luc |
|
Added a way to build a sub-line from its endpoints, and to retrieve the endpoints
from a sub-line. Fixes MATH-592. |
luc |
|
Javadoc fixes in ODE. Fixes MATH-594. Thanks to Dennis Hendriks. |
luc |
|
Added a way to specify a custom root solver to find events in ODE integration. Fixes MATH-586. Thanks to Dennis Hendriks. |
luc |
|
Fixed error in javadoc describing Integer distribution inverse cumulative
probability API. Fixes MATH-540. |
psteitz |
|
Fixed error in javadoc describing the behavior of the Percentile algorithm for
small percentiles in small datasets. Fixes MATH-582. Thanks to Christopher Nix. |
psteitz |
|
New "filter" package. Initial implementation of Kalman filter. Fixes MATH-485. Thanks to Thomas Neidhart. |
erans |
|
Improved k-means++ clustering performances and initial cluster center choice. Fixes MATH-584. Thanks to Randall Scarberry. |
luc |
|
Fixed tricube function implementation in Loess interpolator. Fixes MATH-504. Thanks to X. B.. |
luc |
|
Fixed documentation of statistics examples. Fixes MATH-568. Thanks to Christoph M. Friedrich. |
luc |
|
Improved documentation of general optimization with a thorough example. Fixes MATH-507. Thanks to Ole Ersoy. |
luc |
|
Replaced NullPointerException by NullArgumentException. Fixes MATH-403. |
luc |
|
Added a consistent classes hierarchy for Euclidean spaces in dimension 1, 2 and 3. |
luc |
|
Improved javadoc for FastMath explaining the overhead at class loading and
the targeted use cases. Fixes MATH-579. |
luc |
|
Allow outer product of vectors of different sizes. Fixes MATH-574. |
erans |
|
A complete generic implementation of Binary Space Partitioning Trees (BSP trees)
has been added. A few specializations of this implementation are also provided
for 1D, 2D and 3D Euclidean geometry. This allows support for arbitrary
intervals sets (1D), polygons sets (2D) and polyhedrons sets (3D) with all
sets operations (union, intersection, symmetric difference, difference, complement),
with predicates (point inside/outside/on boundary, emptiness, other region contained),
with geometrical computation (barycenter, size, boundary size) and with conversions
from and to boundary representation. Fixes MATH-576. |
luc |
|
Avoid some array copying in add and subtract ArrayFieldVector. Fixes MATH-573. |
luc |
|
Fixed an unused constructor parameter in ArrayFieldVector. Fixes MATH-572. |
luc |
|
Created an "ExceptionContext" class: It provides the customization feature of
"MathRuntimeException" without imposing a singly rooted hierarchy of the Comons
Math exceptions.
Thus, those exceptions now inherit from their Java standard counterparts (e.g.
"MathIllegalArgumentException" inherits from "IllegalArgumentException"). Fixes MATH-566. |
erans |
|
Fixed conversion problems to/from 0 in Decimal Floating Point (Dfp) class. Fixes MATH-567. Thanks to Michel. |
luc |
|
Fixed initialization of multistep ODE integrators. Relying on the interpolation model
of the starter integrator inside only one step was wrong. The model may have a too
low order to compute high degrees derivatives in the Nordsieck vector. Now we use several
steps and use only grid points instead of interpolated points. |
luc |
|
Added solve methods using double[][] to linear algebra decomposition solvers. Fixes MATH-564. |
luc |
|
Added an interpolator adapter for data with known period. Fixes MATH-562. |
erans |
|
Added a "rectangular" Cholesky decomposition for positive semidefinite matrices. Fixes MATH-541. |
luc |
|
Added setters allowing to change the step size control parameters of adaptive
step size ODE integrators. Fixes MATH-563. |
luc |
|
Added a compareTo method to MathUtils that uses a number of ulps as a
tolerance error, and works well on all numbers, including normals, subnormals,
signed zeroes, infinities and NaNs. Fixes MATH-557. |
luc |
|
Fixed two errors in simplex solver when entries are close together or
when variables are not restricted to non-negative. Fixes MATH-434. Thanks to Thomas Neidhart. |
luc |
|
Improved robustness of k-means++ algorithm, by tracking changes in points assignments
to clusters. Fixes MATH-547. Thanks to Thomas Neidhart. |
luc |
|
Changed MathUtils.round(double,int,int) to propagate rather than
wrap runtime exceptions. Instead of MathRuntimeException, this method
now throws IllegalArgumentException or ArithmeticException under
the conditions specified in the javadoc. Fixes MATH-555. |
psteitz |
|
Reduced cancellation errors in Vector3D.crossProduct. Fixes MATH-554. |
luc |
|
Fixed bug in "MultidimensionalCounter". Fixes MATH-552. Thanks to James Bence. |
erans |
|
All unit tests have been converted to Junit 4. They need at least Junit 4.5 to run
(the ant and maven build systems are currently set to use Junit 4.8.2). Fixes MATH-423. Thanks to Gilles Sadowski. |
luc |
|
Removed the ConvergingAlgorithm interface and ConvergingAlgorithmImpl class. Fixes MATH-500. Thanks to Gilles Sadowski. |
luc |
|
Added a consistency check for number of points with respect to the number
of clusters in Kmeans++ clustering. Fixes MATH-436. Thanks to Thomas Neidhart. |
luc |
|
Added two sided Kolmogorov-Smirnov distribution using modified
Marsaglia et al. (2003) implementation and quick decisions for certain
parameter areas according to Simard et al. (2011). Fixes MATH-437. |
mikl |
|
Added "power" method in "RealMatrix" and "FieldMatrix<T>"
interfaces and their default implementations in "AbstractRealMatrix"
and "AbstractFieldMatrix". Fixes MATH-435. |
mikl |
|
Added "cosine" method in "RealVector" interface and default implementation
in "AbstractRealVector". Fixes MATH-545. |
erans |
|
Fixed bug in "KMeansPlusPlusClusterer". Fixes MATH-546. Thanks to Nate Paymer. |
erans |
|
All exceptions defined in Commons Math provide a context and a compound
message list. Fixes MATH-542. |
erans |
|
Refactored "PolynomialFitter" (in package "optimization.fitting").
Added parametric function in "PolynomialFunction" (in package
"analysis.polynomials"). Fixes MATH-534. |
erans |
|
Removed "HarmonicFunction" (in package "optimization.fitting");
superseded by class "HarmonicOscillator" (in package "analysis.function"). Fixes MATH-518. |
erans |
|
Refactored "HarmonicFitter" (in package "optimization.fitting").
"HarmonicCoefficientsGuesser" removed. Fixes MATH-517. |
erans |
|
Removed "GaussianFunction" and "GaussianDerivativeFunction" (in package
"optimization.fitting"); functionality moved to class "Gaussian" (in
package "analysis.function"). Fixes MATH-516. |
erans |
|
Removed "ParametricGaussianFunction" (in package "optimization.fitting");
functionality moved to class "Gaussian" (in package "analysis.function"). Fixes MATH-514. |
erans |
|
Refactored "GaussianFitter" (in package "optimization.fitting").
The class now really fits a Gaussian function (whereas previously it was
fitting the sum of a constant and a Gaussian). Fixes MATH-512. Thanks to Ole Ersoy. |
erans |
|
Implementation of the CMA-ES optimization algorithm. Fixes MATH-442. Thanks to Dietmar Wolz. |
erans |
|
The interface "ParametricRealFunction" (in package "optimization.fitting") has
been renamed to "ParametricUnivariateRealFunction" and moved to package "analysis". Fixes MATH-513. |
erans |
|
TestUtils is thread-hostile. Remove getters and setters, and make static variables final. Fixes MATH-505. |
sebb |
|
Create FastMath copySign methods. Fixes MATH-496. |
sebb |
|
FastMath atan2 does not agree with StrictMath for special cases. Fixes MATH-494. |
sebb |
|
Removed checked "MaxIterationsExceededException" (superseded by
"MaxCountExceededException" from package "exception"). Fixes MATH-492. |
erans |
|
Removed checked "DimensionMismatchException". Replaced all occurrences by its
equivalent from package "exception". Fixes MATH-491. |
erans |
|
FastMath acos fails when input abs value is less than about 5.7851920321187236E-300 - returns NaN. Fixes MATH-489. |
sebb |
|
FastMath toRadian and toDegree don't handle large double numbers well. Fixes MATH-486. |
sebb |
|
FastMath does not handle all special cases correctly. Fixes MATH-483. |
sebb |
|
Fix ulp(Infinity) to return Infinity rather than NaN. Fixes MATH-480. |
sebb |
|
FastMath.signum(-0.0) does not agree with Math.signum(-0.0). Fixes MATH-479. |
sebb |
|
FastMath is not an exact replacement for StrictMath
(partially fixed) Add signum(float), ulp(float). Fixes MATH-478. |
sebb |
|
FastMath.max(50.0f, -50.0f) => -50.0f; should be +50.0f
Fixed FastMath.max(float, float) so it returns correct value. Fixes MATH-482. |
sebb |
|
MATH-491 MathUtils.equals(double, double) does not work properly for floats
- add equivalent (float, float) methods and basic tests. Fixes MATH-471. |
sebb |
|
Removed "MathException" from the "throws" clause of the "interpolate" method
of the interpolators interfaces (package "analysis.interpolation"). Fixes MATH-458. |
erans |
|
In order to comply with the new runtime exceptions policy, the classes
"RealVectorFormat", "ComplexFormat", "Vector3DFormat" and "CompositeFormat"
do not inherit anymore from the Java standard "Format" class. Failed parsing
will result in the throwing of a "MathParseException".
"CompositeFormat" is now a utility class ("private" constructor). Fixes MATH-461. |
erans |
|
By policy, all Commons Math exceptions must inherit from class
"MathRuntimeException". Fixes MATH-447. |
erans |
|
For optimizers (package "optimization"), the number of allowed function
evaluations is passed as a parameter to the "optimize" method. Fixes MATH-454. |
erans |
|
For solvers (package "analysis.solvers"), the number of allowed function
evaluations is passed as a parameter to the "solve" method. Fixes MATH-451. |
erans |
|
Created a "MathRuntimeException" to serve as a base class for exception
types that need to wrap another (lower-level) exception. Fixes MATH-447. |
erans |
|
Replaced "ComposableFunction" and "BinaryFunction" (in package "analysis")
by a set of utilities in the new class "FunctionUtils" together with
independent function objects in the new "analysis.function" package.
Removed redundant "mapXxx" and "mapXxxToSelf" methods in "RealVector" and
"AbstractRealVector" (in package "linear"). Fixes MATH-430. |
erans |
|
Refactoring of the "analysis.solvers" package. Fixes MATH-439. |
erans |
|
Removed the ode.jacobians package. Fixes MATH-380. |
luc |
|
Removed classes "FunctionEvaluationException", "MatrixVisitorException"
and "DerivativeException" (superseded by the new "MathUserException"). Fixes MATH-440. |
erans |
|
Created a generic "Pair" class to replace the "AbstractMap.SimpleEntry"
that is only available in Java 6 and later. Fixes MATH-432. |
erans |
|
Class "DirectSearchOptimizer" (and subclasses "NelderMead"
and "MultiDirectional") was refactored into new classes:
"SimplexOptimizer" and "AbstractSimplex" (and subclasses
"NelderMeadSimplex" and "MultiDirectionalSimplex"). The old
classes were deprecated and removed. Fixes MATH-428. |
erans |
|
Created "MatrixDimensionMismatchException" to replace
"InvalidMatrixException" (when the latter is used to signal that
matrices are not compatible for some operation).
Replaced "MatrixIndexException" with "OutOfRangeException" (when the
former is used to signal a row or column dimension mismatch). Fixes MATH-425. |
erans |
|
Made "sample" methods part of the "IntegerDistribution" and
"ContinuousDistribution" interfaces. Fixes MATH-310. |
erans |
|
All distribution classes (in package "distribution") are immutable. Fixes MATH-349. |
erans |
|
Created an unchecked "FunctionEvaluationException".
Modified the "UnivariateRealFunction" interface: Removed the checked
"FunctionEvaluationException" from the signature of the "value" method. Fixes MATH-195. |
erans |
|
Modified semantics: "equals" methods now consider that NaNs are not
equal (compliant with IEEE754).
Also, two adjacent floating point numbers are considered equal (this
is consistent with the fact that all real numbers between them can be
represented by either of the two). One consequence of that is that
"equals" is not transitive. Fixes MATH-370. |
erans |
|
Removed methods referring to the concept of "iteration".
Removed interface methods to access the number of evaluations of the
gradient and Jacobian.
Added new "Incrementor" utility to be used as a bounded counter for
objective function evaluations.
Removed all references to "OptimizationException" (replaced by
"ConvergenceException"). Fixes MATH-397. |
erans |
|
Modified "AbstractUnivariateRealOptimizer" to make it more similar to
"BaseAbstractScalarOptimizer".
Added utility methods in "ConvergingAlgorithmImpl". Fixes MATH-397. |
erans |
|
Refactoring of some classes in package "optimization.general" to remove
code duplication and to allow the implementation of optimization algorithms
that do not use derivatives.
Created interface "BaseMultivariateRealOptimizer".
Created classes "BaseAbstractScalarOptimizer" and "AbstractScalarOptimizer".
"MultivariateRealOptimizer" and "DifferentiableMultivariateRealOptimizer"
both extend "BaseMultivariateRealOptimizer".
"AbstractScalarOptimizer" extends "BaseAbstractScalarOptimizer" and
"AbstractScalarDifferentiableOptimizer" inherits from "AbstractScalarOptimizer". Fixes MATH-389. |
erans |
Release 2.2 – 2011-03-02
| Type |
Changes |
By |
|
FastMath is not an exact replacement for StrictMath
(partially fixed) added scalb(double, int), scalb(float, int). Fixes MATH-498. |
luc |
|
FastMath is not an exact replacement for StrictMath
(partially fixed) added hypot(double, double), nextAfter(double, double)
and nextAfter(float,double) (beware of the strange double second argument)
so that they handle special values in the way as StrictMath. Fixes MATH-478. |
luc |
|
FastMath is not an exact replacement for StrictMath
(partially fixed) added getExponent(double) and getExponent(float). Fixes MATH-497. |
luc |
|
FastMath is not an exact replacement for StrictMath
(partially fixed) Add copySign(double), copySign(float). Fixes MATH-496. |
sebb |
|
separate discrete event detection from adaptive step size handling in ODE solvers,
thus improving robustness, maintainability and speed. Fixes MATH-484. |
luc |
|
Fixed an awkward statement that triggered a false positive warning. Fixes MATH-467. |
luc |
|
Added complementary error function, erfc. Fixes MATH-364. Thanks to Christian Winter. |
psteitz |
|
Modified erf (and erfc) to return extreme values for x with abs(x) > 40.
For these arguments, the true value is indistinguishable from an extrema as a double. Fixes MATH-456. |
psteitz |
|
Added characteristic support to distributions, including methods to return numerical
estimates of the mean and variance and upper and lower bounds of support. In version 2.2,
methods returning distribution characteristics have been added only to the implementation
classes. In version 3, supporting methods have been added to the abstract base classes
and distribution interfaces. Fixes MATH-385. |
mikkel |
|
Added a constructor and addValues(double[]) methods allowing DescriptiveStatistics to
be initialized with values from a double[] array. Similarly enhanced
ResizeableDoubleArray. Fixes MATH-384. |
mikkel |
|
Added a getUniqueCount() method to Frequency to return the number of unique
values included in the frequency table. Fixes MATH-448. Thanks to Patrick Meyer. |
psteitz |
|
Modified NormalDistributionImpl.cumulativeProbability to return 0 or 1,
respectively for values more than 40 standard deviations from the mean.
For these values, the actual probability is indistinguishable from 0 or 1
as a double. Top coding improves performance for extreme values and prevents
convergence exceptions. Fixes MATH-414. |
psteitz |
|
Added toString() override to StatisticalSummaryValues. Fixes MATH-420. |
psteitz |
|
Deprecated the whole ode.jacobians package. It is clumsy and difficult to use. It will
be replaced by a completely rewritten implementation in 3.0, which will be more tightly
bound to the top level ode package. Fixes MATH-380. |
luc |
|
Added a normalization feature to transform samples so they have zero mean and unit standard deviation. Fixes MATH-426. Thanks to Erik van Ingen. |
luc |
|
Created "MathUserException" class to convey cause of failure between
layers of user code separated by a layer of Commons Math code. Deprecated
classes "FunctionEvaluationException", "MatrixVisitorException" and
"DerivativeException". Fixes MATH-440. |
erans |
|
Fixed k-means++ to add several strategies to deal with empty clusters that
may appear during iterations. Fixes MATH-429. |
luc |
|
Improved Percentile performance by using a selection algorithm instead of a
complete sort, and by allowing caching data array and pivots when several
different percentiles are desired. Fixes MATH-417. |
luc |
|
Fixed an error preventing zero length vectors to be built by some constructors. Fixes MATH-391. |
luc |
|
Fixed an error preventing ODE solvers to be restarted after they have
been stopped by a discrete event. Fixes MATH-421. |
luc |
|
Added new random number generators from the Well Equidistributed
Long-period Linear (WELL). Fixes MATH-419. |
luc |
|
Made intercept / no intercept configurable in multiple regression
classes. By default, regression models are estimated with an intercept
term. When the "noIntercept" property is set to true, regression models
are estimated without intercepts. Fixes MATH-409. |
psteitz |
|
Fixed lost cause in MathRuntimeException.createInternalError. Note that
the message is still the default message for internal errors asking to
report a bug to Commons Math JIRA tracker. In order to retrieve the
message from the root cause, one has to get the cause itself by getCause(). Fixes MATH-415. |
luc |
|
Modified multiple regression newSample methods to ensure that by default
in all cases, regression models are estimated with intercept terms.
Prior to the fix for this issue, newXSampleData(double[][]),
newSampleData(double[], double[][]) and newSampleData(double[], double[][], double[][])
all required columns of "1's" to be inserted into the x[][] arrays to
create a model with an intercept term; while newSampleData(double[], int, int)
created a model including an intercept term without requiring the
unitary column. All methods have been changed to eliminate the need for
users to add unitary columns to specify regression models.
Users of OLSMultipleLinearRegression or GLSMultipleLinearRegression
versions 2.0 or 2.1 should either verify that their code either does
not use the first set of data loading methods above or set the noIntercept
property on estimated models to get the previous behavior. Fixes MATH-411. |
psteitz |
|
Added the dfp library providing arbitrary precision floating point computation in the spirit of
IEEE 854-1987 (not exactly as it uses base 1000 instead of base 10). In addition to finite numbers,
infinities and NaNs are available (but there are no subnormals). All IEEE 854-1987 rounding modes and
signaling flags are supported. The available operations are +, -, *, / and the available functions
are sqrt, sin, cos, tan, asin, acos, atan, exp, log. Fixes MATH-412. Thanks to Bill Rossi. |
luc |
|
Added faster and more accurate version of traditional mathematical functions in a FastMath
class intended to be a drop-in replacement for java.util.Math at source-level. Some functions
still directly delegates to Math but this will improve with time. Some functions like exp
may be twice as fast (even 3 times faster on some processors). Sine, cosine or power functions
show typical speedups of 1.5 times faster or more. Fixes MATH-375. Thanks to Bill Rossi. |
luc |
|
Added R-squared and adjusted R-squared statistics to OLSMultipleLinearRegression. Fixes MATH-386. |
psteitz |
|
Corrected the formula used for Y variance returned by calculateYVariance and associated
methods in multiple regression classes (AbstractMultipleLinearRegression,
OLSMultipleLinearRegression, GLSMultipleLinearRegression). These methods previously returned
estimates of the variance in the model error term. New "calulateErrorVariance" methods have
been added to compute what was previously returned by calculateYVariance. Fixes MATH-392. Thanks to Mark Devaney. |
psteitz |
|
Bug fixed in Levenberg-Marquardt (handling of weights). Fixes MATH-406. |
dimpbx |
|
Bug fixed in Levenberg-Marquardt (consistency of current). Fixes MATH-405. |
dimpbx |
|
Bug fixed in chi-square computation in AbstractLeastSquaresOptimizer. Fixes MATH-377. |
dimpbx |
|
Added support for Gaussian curve fitting. Fixes MATH-400. Thanks to J. Lewis Muir. |
luc |
|
Fixed several bugs in "BrentOptimizer". Fixes MATH-395. |
erans |
|
Fixed inconsistency in return values in "MultiStartUnivariateRealOptimizer". Fixes MATH-393. |
erans |
|
Added a feature allowing error estimation to be computed only on a subset of
Ordinary Differential Equations, considered as the main set, the remaining equations
being considered only as an extension set that should not influence the ODE integration
algorithm. Fixes MATH-388. |
luc |
|
Fixed bug in precondition check (method "setMicrosphereElements"). Fixes MATH-382. |
erans |
|
Created "MultidimensionalCounter" class. Fixes MATH-379. |
erans |
|
Created package "exception" to contain the new exceptions hierarchy.
Created package "exception.util": utilities for the exception classes
(e.g. managing the localization of error messages).
Default policy for dealing with invalid null references: raise a
"NullArgumentException" (subclass of "IllegalArgumentException"). Fixes MATH-361. |
erans |
|
Implementation of linear interpolation. Fixes MATH-378. Thanks to Matthew Rowles. |
erans |
|
Improved localization of error messages. Fixes MATH-361. |
luc |
|
Allow multiple optimizations with a default simplex. Fixes MATH-376. |
erans |
|
Added new "equalsIncludingNaN" methods that have the same semantics as the old "equals" methods.
These are deprecated, and their semantics will be modified (in the next major release) such that
NaNs are not considered equal (to be more compliant with IEEE754). Fixes MATH-370. |
erans |
|
Added a setQRRankingThreshold method to Levenberg-Marquardt optimizer to improve robustness
of rank determination. Fixes MATH-352. |
luc |
|
Added random data generation methods to RandomDataImpl for the remaining distributions in the
distributions package. Added a generic nextInversionDeviate method that takes a discrete
or continuous distribution as argument and generates a random deviate from the distribution.
Also added sampling methods based on the implementations in RandomDataImpl to distributions. Fixes MATH-310. |
psteitz |
|
Fixed Levenberg-Marquardt optimizer that did not use the vectorial convergence checker.
Now this optimizer can use either the general vectorial convergence checker or its own
specialized convergence settings. Fixes MATH-362. |
luc |
|
Fixed loss of significance error in PersonsCorrelation p-value computation causing p-values
smaller than the machine epsilon (~1E-16) to be reported as 0. Fixes MATH-371. Thanks to Kevin Childs. |
psteitz |
|
Fix NullPointerException in BisectionSolver.solve(f, min, max, initial). Fixes MATH-369. Thanks to Sasun Pundev. |
luc |
|
Fix spelling of getSparcity [sic] method of OpenMapRealVector. Fixes MATH-368. |
billbarker |
|
Fix problem with the default sparseIterator when a RealVector has exactly one non-zero entry. Fixes MATH-367. Thanks to Albert Huang. |
billbarker |
|
Implementation of tricubic interpolation. Fixes MATH-366. |
erans |
|
Deprecated SmoothingBicubicSplineInterpolator and SmoothingBicubicSplineInterpolatorTest.
Added BicubicSplineInterpolator and BicubicSplineInterpolatorTest.
Added SmoothingPolynomialBicubicSplineInterpolator and SmoothingPolynomialBicubicSplineInterpolatorTest.
Added method to clear the list of observations in PolynomialFitter. Fixes MATH-365. |
erans |
Release 2.1 – 2010-04-02
| Type |
Changes |
By |
|
Fix use of wrong variable in SmoothingBicubicSplineInterpolatorTest.testPreconditions(). Fixes MATH-360. |
sebb |
|
Added method to clear the list of observations in CurveFitter. Fixes MATH-356. |
erans |
|
Implementation of bicubic interpolation. Fixes MATH-357. |
erans |
|
Added density functions to remaining continuous distributions (F, T, Weibull, Cauchy).
As of Math 2.1, all continuous distributions implement density functions. The HasDensity
interface has been deprecated and in version 3.0, density(double) will be added to the
ContinuousDistribution interface. Fixes MATH-332. Thanks to Mikkel Meyer Andersen. |
psteitz |
|
Changed equals() methods to use instanceof check rather than catching ClassCastException;
this also allows some null checks to be omitted. Fixes MATH-337. |
sebb |
|
Removed unnecessary null checks in equals methods. Fixes MATH-336. |
sebb |
|
Fraction.hashCode() implementation was not fully consistent with Fraction.equals().
Changed hashCode() to use fields directly to agree with equals(). Fixes MATH-335. |
sebb |
|
Resolved multiple problems leading to inaccuracy and/or failure to compute Normal,
ChiSquare and Poisson probabilities, Erf and Gamma functions. Made Brent solver
absolute accuracy configurable for all continuous distributions. Fixes MATH-282. |
psteitz |
|
Fixed too stringent interval check in Brent solver: initial guess is now
allowed to be at either interval end. Fixes MATH-347. |
luc |
|
Added a way to compute both the final state in an Initial Value Problem (IVP)
for Ordinary Differential Equations (ODE) and its derivatives with respect to
initial state and with respect to some problem parameters. This allows wrapping
ODE solvers into optimization or root finding algorithms, which in turn can be
used to solve Boundary Value Problems (BVP). There are no implementations (yet)
of BVP solvers in the library. |
luc |
|
Fixed an error in events handling in ODE solvers. In some rare cases, events
occurring close to a step start were handled without truncating the step, making
them appear as is they occurred close to the step end. Fixes MATH-358. |
luc |
|
Fixed a problem with getInterpolatedDerivatives returning zero derivatives when
an ODE step handler is configured to not use interpolation. It now returns a
constant but non-zero value consistent with at least one point inside the step |
luc |
|
Fixed wrong return values when enpoints are roots in Brent solver with
a user provided initial guess. Fixes MATH-344. |
luc |
|
Fixed a missing bracketing check of initial interval in Brent solver. Fixes MATH-343. |
luc |
|
In SVD, the matrices passed to EigenDecomposition are now symmetric
by construction (rather than simply by definition). In EigenDecomposition,
once the tridiagonal form is obtained, the non-significant elements are
set to 0. Fixes MATH-342. |
dimpbx |
|
A EigenDecompositionImpl simplified makes it possible to compute
the SVD of a singular matrix (with the right number of elements in
the diagonal matrix) or a matrix with singular value(s) of multiplicity
greater than 1. Fixes MATH-333. |
dimpbx |
|
Added SemiVariance statistic. Fixes MATH-323. Thanks to Larry Diamond. |
psteitz |
|
Added a warning in the getCoefficients method documentation for
PolynomialFunctionLagrangeForm. Computation may be ill-conditioned
so this method should be used with care. Fixes MATH-341. |
luc |
|
Fixed an error in BigFraction multiplication for large numerators that don't
fit in a primitive int. Fixes MATH-340. |
luc |
|
Fixed a spurious exception in EigenDecompositionImpl when a 3x3 block
had two identical eigenvalues. |
luc |
|
Added min/max getters for real vectors (not yet in the RealVector interface for
compatibility purposes, but in the AbstractRealVector abstract class). Fixes MATH-334. |
luc |
|
Fixed automatic step initialization in embedded Runge-Kutta integrators.
The relative tolerance setting was never used, only the absolute tolerance
was used. Fixes MATH-338. Thanks to Vincent Morand. |
luc |
|
Fixed regression in Frequency.getPct(Object) introduced in 2.0. Cumulative
percent was being returned for Object arguments in place of percent. Fixes MATH-329. |
psteitz |
|
Singular Value Decomposition now computes either the compact SVD (using only
positive singular values) or truncated SVD (using a user-specified maximal
number of singular values). Fixes MATH-321. |
luc |
|
Fixed Singular Value Decomposition solving of singular systems. Fixes MATH-320. |
luc |
|
Added MathUtils methods to compute gcd and lcm for long arguments. Fixes MATH-239. Thanks to Christian Semrau. |
psteitz |
|
Added support for weighted univariate statistics. Fixes MATH-287. Thanks to Matthew Rowles. |
psteitz |
|
Fixed a wrong implementation of the Linf norm in vectors. Fixes MATH-326. Thanks to Jake Mannix. |
luc |
|
Fixed a convergence discrepancy with respect to theory in Gragg-Bulirsch-Stoer
integrator. Fixes MATH-324. Thanks to Vincent Morand. |
luc |
|
Fixed a wrong dimension check in SVD solver. Thanks to Dimitri Pourbaix. |
luc |
|
Added composition features for real functions. Fixes MATH-313. Thanks to Jake Mannix. |
luc |
|
Added mapping and iteration methods to vectors. Provided a default implementation
for the numerous simple methods in the RealVectorInterface. Fixes MATH-312. Thanks to Jake Mannix. |
luc |
|
Fixed an error in handling very close events in ODE integration. Fixes MATH-322. |
luc |
|
Fixed an overflow error in MathUtils.distance that was causing KMeansPlusPlusClusterer
to fail with a NullPointerException when component distances between points
exceeded Integer.MAXVALUE. Fixes MATH-305. Thanks to Erik van Ingen. |
psteitz |
|
Added generationsEvolved property to GeneticAlgorithm to track the number of generations
evolved by the evolve() method before reaching the StoppingCondition. Fixes MATH-315. Thanks to Mikkel Meyer Andersen. |
psteitz |
|
Fixed an index computation error in eigen decomposition. Once again, kudos to Dimitri
for debugging this. Fixes MATH-318. Thanks to Dimitri Pourbaix. |
luc |
|
Fixed an ArrayIndexOutOfBoundsException in eigen decomposition. Kudos to Dimitri
for debugging this, it was really difficult. Fixes MATH-308. Thanks to Dimitri Pourbaix. |
luc |
|
Fixed parameter test in RandomDataImpl#nextExponential. The method now throws
IllegalArgumentException for mean = 0. Fixes MATH-309. Thanks to Mikkel Meyer Andersen. |
psteitz |
|
Changed probability calculations for Binomial, Poisson, and Hypergeometric
distributions to use Catherine Loader's saddle point approximations. Fixes MATH-311. Thanks to Nipun Jawalkar. |
brentworden |
|
Removed dead code from Complex#divide. Fixes MATH-306. Thanks to Joerg Huber. |
psteitz |
|
Fixed implementation of RandomDataImpl#nextPoisson by implementing an alternative
algorithm for large means. Fixes MATH-294. |
psteitz |
|
Added support for multidimensional interpolation using the robust microsphere algorithm. Fixes MATH-300. Thanks to Gilles Sadowski. |
psteitz |
|
Fixed implementation of EmpiricalDistributionImpl#getUpperBounds to match
interface contract. Added getGeneratorUpperBounds method to
EmpiricalDistributionImpl providing previous behavior. Fixes MATH-298. |
psteitz |
|
Fixed wrong results on Loess interpolation, also added a way to set weights
for smoothing and to ignore zero weights for coefficients computation. Fixes MATH-296. Thanks to Eugene Kirpichov. |
luc |
|
Fixed a OutOfBoundException in simplex solver when some constraints are tight. Fixes MATH-293. Thanks to Benjamin McCann. |
luc |
|
Fixed misleading number formats in error messages for adaptive
stepsize integrators. Fixes MATH-291. Thanks to Sebb. |
luc |
|
Added support for weighted descriptive statistics. Fixes MATH-287. Thanks to Matthew Rowles. |
psteitz |
|
Added normalizeArray method to MathUtils. |
psteitz |
|
Fixed a NullPointerException in simplex solver when no solution is possible
and some constraints are negative. Fixes MATH-290. Thanks to Benjamin McCann. |
luc |
|
Removed an unused argument in a private method in simplex solver. Fixes MATH-289. |
luc |
|
Fixed an error induced by entries set to 0 in simplex solver. Fixes MATH-288. Thanks to Benjamin McCann. |
luc |
|
Fixed an error leading the simplex solver to compute the right solution
but return another one. Fixes MATH-286. Thanks to Benjamin McCann. |
luc |
|
Prevent infinite loops in multi-directional direct optimization method when
the start point is exactly at the optimal point. Fixes MATH-283. Thanks to Michael Nischt. |
luc |
|
Prevent possible zero divides on eigenvectors of indefinite matrices. Fixes MATH-297. Thanks to Axel Kramer. |
billbarker |
Release 2.0 – 2009-08-03
| Type |
Changes |
By |
|
Fixed an error in RealMatrix javadoc. Fixes MATH-281. Thanks to Albert Huang. |
luc |
|
Added an implementation of the Mersenne twister pseudo random number generator
from Makoto Matsumoto and Takuji Nishimura |
luc |
|
Changed the return type of the various interpolation algorithms to the
specific implementation of UnivariateRealFunction each one uses Thanks to Gilles Sadowski. |
luc |
|
The behavior of the bracket method in UnivariateRealSolverUtils has been changed to return successfully
when a tentative bracketing interval has a root exactly at one of its end points. Previously, such intervals
triggered an exception. Fixes MATH-280. |
luc |
|
Added a check for too few rows with respect to the number of predictors in linear regression. Fixes MATH-279. Thanks to Michael Bjorkegren. |
luc |
|
Added a getCovariance method to singular value decomposition Thanks to Dimitri Pourbaix. |
luc |
|
Added robust locally weighted regression (Loess). Fixes MATH-278. Thanks to Eugene Kirpichov. |
luc |
|
Added a scalar multiply to the Complex class. Fixes MATH-277. Thanks to Mark Anderson. |
luc |
|
Added curve fitting with a general case and two specific cases (polynomial and harmonic). |
luc |
|
Optimized Complex isNaN(), isInfinite() by moving computation to constructor. Fixes MATH-276. Thanks to Mark Anderson. |
psteitz |
|
Added Genetic Algorithm implementation. Fixes MATH-207. Thanks to David Stefka. |
psteitz |
|
Fixed detection of not positive definite matrices in Cholesky decomposition. Fixes MATH-274. |
luc |
|
Fixed a wrong check for basic variables. Fixes MATH-273. Thanks to Benjamin McCann. |
luc |
|
Fixed a problem when setting some variables (several variables were set
instead of only one). Fixes MATH-272. Thanks to Benjamin McCann. |
luc |
|
Added a way to limit the number of functions evaluations in optimizers
(the number of iterations could already be limited) Thanks to Gilles Sadowski. |
luc |
|
Added digamma function. Fixes MATH-267. Thanks to Ted Dunning. |
psteitz |
|
Added Spearman's rank correlation (SpearmansCorrelation). Fixes MATH-136. Thanks to John Gant. |
psteitz |
|
Added support for rank transformations. |
psteitz |
|
Completed internationalization of all error messages |
luc |
|
Added a clustering package with an implementation of the k-means++ algorithm. Fixes MATH-266. Thanks to Benjamin McCann. |
luc |
|
Added distance1, distance and distanceInf utility methods for double and
int arrays in MathUtils. Fixes MATH-265. Thanks to Benjamin McCann. |
luc |
|
Added an utility equality method between double numbers using tolerance
in ulps (Units in Last Position). Fixes MATH-264. Thanks to Gilles Sadowski. |
luc |
|
Added getNorm1, getNormInf, distance1 and distanceInf to the Vector3D class. Fixes MATH-263. |
luc |
|
Added support for any type of field in linear algebra (FielxMatrix, FieldVector,
FieldLUDecomposition) |
luc |
|
The RealMatrixImpl implementation classes has been renamed Array2DRowRealMatrix
to reflect its specificities and for consistency with the new implementations. The
previous name is still available but is deprecated |
luc |
|
Added a block-based storage type for dense matrices improving speed for large dimensions |
luc |
|
Added AggregateSummaryStatistics class to support aggregation of SummaryStatistics. Thanks to John Bollinger. |
psteitz |
|
Added general Field and FieldElement interfaces to allow generic algorithms
to operate on fields. The library already provides several implementations:
Complex, Fraction, BigFraction and BigReal |
luc |
|
Fixed inconsistent access to multidimensional array in FastFourierTransformer. Fixes MATH-257. Thanks to Sebb. |
luc |
|
Greatly improved multiplication speed for sparse matrices. Fixes MATH-248. |
luc |
|
Fixed threading issues with MathException and MathRuntimeException. Fixes MATH-253. Thanks to Sebb. |
luc |
|
Fixed threading issues with UnivariateRealSolverUtils factory. Fixes MATH-254. Thanks to Sebb. |
luc |
|
Reduced visibility of MessagesResources_fr.contents field to private. Fixes MATH-255. Thanks to Sebb. |
luc |
|
Added Fraction.toString(). Fixes MATH-256. |
luc |
|
Added add/subtract/multiply/divide functions with integer parameters to Fraction |
luc |
|
Added some utility functions to compute powers with integral types (int, long, BigInteger). |
luc |
|
Fixed a comparison error when two different fractions evaluate to the
same double due to limited precision. Fixes MATH-252. |
luc |
|
Added a BigFraction class that does not overflow when big numerators or
denominators are used. Fixes MATH-251. Thanks to Benjamin Croizet. |
luc |
|
Added an optimizer for constrained linear problems based on 2-phases standard simplex. Fixes MATH-246. Thanks to Benjamin McCann. |
luc |
|
Redesigned the optimization framework for a simpler yet more powerful API.
Added non-linear conjugate gradient optimizer. Fixes MATH-177. |
luc |
|
Fixed an error in computing gcd and lcm for some extreme values at integer
range boundaries. Fixes MATH-243. Thanks to Christian Semrau. |
luc |
|
Added a MathUtils method to check equality given some error bounds. Fixes MATH-247. Thanks to Benjamin McCann. |
luc |
|
Added PearsonsCorrelation class to compute correlation matrices, standard
errors and p-values for correlation coefficients. Fixes MATH-114. Thanks to John Gant. |
psteitz |
|
Added Covariance class to compute variance-covariance matrices in new
correlation package. Fixes MATH-114. |
psteitz |
|
Improved fast Fourier transform efficiency. Fixes MATH-216. Thanks to Cyril Briquet. |
luc |
|
Added a SparseRealVector class that implements a sparse vector for the RealVector interface. |
billbarker |
|
Added factory methods to create Chebyshev, Hermite, Laguerre and Legendre polynomials. |
luc |
|
Added add, subtract, negate, multiply and toString methods to PolynomialFunction. |
luc |
|
Changed FractionFormat to extend NumberFormat. Fixes MATH-189. |
psteitz |
|
Forced symmetry in binomialCoefficientLog and added test cases for MathUtils. Fixes MATH-242. Thanks to Christian Semrau. |
psteitz |
|
Fixed error in binomial coefficient computation. Fixes MATH-241. Thanks to Christian Semrau. |
psteitz |
|
Added a Legendre-Gauss integrator. |
luc |
|
Fixed error in factorial computation for 17 <= n <= 20. Fixes MATH-240. Thanks to Christian Semrau. |
psteitz |
|
Integration algorithms now can have both relative and absolute
accuracy settings. |
luc |
|
Added a new univariate sub-package below the optimization package. Fixes MATH-177. Thanks to Gilles Sadowski. |
luc |
|
The analysis package has been reorganized with several sub-packages. |
luc |
|
Fixed an error in gcd computation for large values. Fixes MATH-238. Thanks to Christian Semrau. |
luc |
|
Added method to walk matrix entries with or without changing them in the
visitor design pattern sense. Three different orders can be used, row by row,
column by column or optimized order according to internal storage. Optimized
order should be preferred when no specific order is needed, because it will be
more cache efficient. |
luc |
|
Added Fast Hadamard Transform. Fixes MATH-215. Thanks to Bernhard Grünewaldt. |
luc |
|
Added nth root computation for complex numbers. Fixes MATH-236. Thanks to Bernhard Grünewaldt. |
luc |
|
Added support for sparse matrix. Fixes MATH-230. Thanks to Sujit Pal and Ismael Juma. |
luc |
|
Added an int/double hash map (OpenIntToDoubleHashMap) with much smaller
memory overhead than standard java.util.Map (open addressing and no boxing). Thanks to Ismael Juma. |
luc |
|
Added support for multi-dimensional Fourier transform. Fixes MATH-152. Thanks to Remi Arntzen. |
luc |
|
The root solvers and the integrators now take the function to solve as a
parameter to the solve/integrate methods, thus allowing to reuse the same
solver/integrator for different functions. Fixes MATH-218. |
luc |
|
Added setter methods for rows and columns in matrices. Fixes MATH-234. |
luc |
|
Added Frobenius matrix norm. Fixes MATH-232. |
luc |
|
Added an abstract matrix implementation simplifying extension by users. Fixes MATH-231. |
luc |
|
Added support for the Zipf distribution. Fixes MATH-178. Thanks to Paul Cowan. |
luc |
|
Added support for copying statistics. Changes to stats classes
include copy constructor, static copy(-,-) and instance copy()
methods. Added copy() to UnivariateStatistic and StorelessUnivariateStatistic
interfaces. Fixes MATH-212. Thanks to Jason C. HandUber. |
psteitz |
|
Added a removal feature for observations in descriptive statistics. Fixes MATH-229. Thanks to Cyril Briquet. |
luc |
|
Added a scalb method in MathUtils. This method is similar to the method
with same name added in java.lang.Math as of Java 6. |
luc |
|
Fixed F distribution inverse CDF computation for small denominator degrees of freedom. Fixes MATH-227. Thanks to Joerg Henning. |
brentworden |
|
Fixed an error in CorrelatedRandomVectorGenerator leading to a component of
the generated vector being constant. Fixes MATH-226. Thanks to Stuart Siegel. |
luc |
|
Greatly improved QR-decomposition speed using transposed matrices internally. Fixes MATH-223. Thanks to John Mulcahy. |
luc |
|
Fixed an infinite loop encountered in some backward integration cases for ODE solvers. Thanks to Pascal Parraud. |
luc |
|
Added beta distribution. Fixes MATH-222. Thanks to Ted Dunning. |
luc |
|
Added probability density functions computation for distributions for which
it is feasible. Fixes MATH-222. Thanks to Ted Dunning. |
luc |
|
Changed the Complex.equals() method so that it considers +0 and -0 are equal,
as required by IEEE-754 standard. Fixes MATH-221. Thanks to Dieter Roth. |
luc |
|
Added JAMA-like interfaces for eigen/singular problems. The implementation
are based on the very quick dqd/dqds algorithms and some parts of the MRRR
algorithm. This leads to very fast and accurate solutions. Fixes MATH-220. |
luc |
|
Added JAMA-like interfaces for decomposition algorithms. These interfaces
decompose a matrix as a product of several other matrices with predefined
properties and shapes depending on the algorithm. These algorithms allow to
solve the equation A * X = B, either for an exact linear solution
(LU-decomposition, Cholesky decomposition) or an exact or least-squares
solution (QR-decomposition). Fixes MATH-220. |
luc |
|
Added removeData methods for the SimpleRegression class. This allows
to support regression calculations across a sliding window of (time-based)
observations without having to recalculate for the entire window every time. Fixes MATH-219. Thanks to Andrew Berry. |
luc |
|
Support for one dimensional vectors has been added to the linear algebra
package with a RealVector interface, a RealVectorImpl default implementation
using a single double array to store elements and a RealVectorFormat for
input/output. Thanks to Andreas Rieger. |
luc |
|
Changed OLS regression implementation added in MATH-203 to use
QR decomposition to solve the normal equations. Fixes MATH-217. |
psteitz |
|
New ODE integrators have been added: the explicit Adams-Bashforth and implicit
Adams-Moulton multistep methods. As the implementations of these methods are based
on Nordsieck vector rather than a traditional array of previous steps, they both
have been improved to handle adaptive stepsize. These methods provide the same rich
features has the existing ones: continuous output, step handlers, discrete events,
G-stop ... |
luc |
|
Replaced size adjustment of all steps of fixed steps Runge-Kutta integrators by
a truncation of the last step only. Fixes MATH-214. |
luc |
|
The ODE integrators now support several step handlers at once, instead of just one.
This is more consistent with event handlers management.
The setStepHandler method has therefore been replaced by addStephandler, the
getStepHandler method has been replaced by getStepHandlers which returns a Collection
and a clearStepHandlers method has been added. |
luc |
|
All ODE integrators now support setting a maximal number of evaluations of differential
equations function. If this number is exceeded, an exception will be thrown during
integration. This can be used to prevent infinite loops if for example error control or
discrete events create a really large number of extremely small steps. |
luc |
|
All step interpolators for ODE integrators now provide interpolation for
both the state and its time derivatives. The interpolated derivatives are
the exact derivatives of the interpolated state, thus preserving consistency.
The general step handlers hence do not need to call the derivation function
anymore. The fixed step handlers also get the time derivative of the state
as an additional argument along with the state when they are called. |
luc |
|
Changed return type for FirstOrderIntegrator.integrate() to double
in order to retrieve exact stop time. This allows to handle properly
integration interruption due to an EventHandler instance asking to
stop the integration when its associated event is triggered. The state
was already set to the current state at interruption time, but it was
difficult to get the corresponding time (it involved setting a step
handler monitoring the last step specially). Fixes MATH-213. |
luc |
|
Events handlers in the ODE package now also provide the switching function
variation (increasing/decreasing) when an event occurs |
luc |
|
Clarified the ODE package by breaking in into several sub-packages and renaming
classes (SwitchingFunctions/EventHandler, SwitchingFunctionsHandler/CombinedEventsManager) |
luc |
|
Changed return type for FirstOrderIntegrator.getSwitchingFunctions()
to a collection of SwitchingFunction instances. This better suits the
intended use of the method and fixes a visibility error since the
previous return type referenced the package private SwitchState class. Fixes MATH-210. |
luc |
|
Fixed dimension error on output vector for the operate method
in RealMatrixImpl and BigMatrixImpl classes. Fixes MATH-209. Thanks to Thomas Chust. |
luc |
|
The FirstOrderDifferentialEquations, FirstOrderIntegrator and FixedStepHandler
interfaces now extends Serializable, allowing integrators, problems and
handlers to be embedded into users Serializable classes. |
luc |
|
Added several convenience methods and constants for Vector3D and Rotation. |
luc |
|
Replaced public no argument constructors with IDENTITY or ZERO
static instances for immutable classes Vector3D and Rotation. |
luc |
|
Fixed inconsistencies in the naming scheme for static fields in
Vector3D and Rotation with respect to the overall library. |
luc |
|
Greatly improved RealMatrixImpl and BigMatrixImpl performances,
both in terms of speed and in terms of temporary memory footprint. |
luc |
|
Added Mauro's patch to support multiple regression. Fixes MATH-203. Thanks to Mauro Talevi. |
luc |
|
Starting with version 2.0 of the library, the minimal version of the Java
platform required to compile and use Commons Math is Java 5. This version
is widely deployed now on many systems. It brings new important features
for specific mathematical developments, for example new functions (log10,
cbrt, ulp, signum, cosh, sinh, tanh, hypot, expm1, log1p), autoboxing,
MathContext or RoundingMode. It also brings important features for general
development, for example enums, generics or annotations. |
luc |
|
Switching functions can now throw dedicated SwitchException from all their
method. At upper call level, the various ODE integrators handle these new
exceptions and wrap them into IntegratorException instances, hence the
integrators methods signature did not change. |
luc |
|
Added the getSwitchingFunctions and clearSwitchingFunctions to the
FirstOrderIntegrator interface and all its implementations. Fixes MATH-202. |
luc |
|
Removed deprecated features. This includes the following changes. Factory-based
instantiation replaced by setter injection in 1.2 in several classes have been
removed. Protected fields in matrices implementations have been declared final
and private. Identity factory methods moved to MatrixUtils class have been
removed. Complex utilities methods that have been superseded by Complex instance
methods have been removed. |
luc |
|
Fixed formula in fast cosine transformer javadoc comments. Fixes MATH-205. Thanks to Roman Werpachowski. |
luc |
|
Javadoc and style fixes. Fixes MATH-193. Thanks to Michael Heuer and Sebb. |
brentworden |
|
Added an error detection for missing imaginary character while parsing complex string. Fixes MATH-198. Thanks to Frederick Salardi. |
luc |
|
Detect numerical problems in Q.R decomposition for Levenberg-Marquardt estimator
and report them appropriately. Fixes MATH-199. Thanks to Mick. |
luc |
|
Fixed several crashes in getCovariances() and guessParametersErrors() in
AbstractEstimator when some parameters are bound. The methods now explicitly
give result only about unbound parameters. Fixes MATH-200. Thanks to Plamen Petrov. |
luc |
|
Fixed truncation error in t-test classes for large t values. Fixes MATH-201. Thanks to Peter Wyngaard. |
brentworden |
|
Added root checks for the endpoints. Fixes MATH-204. Thanks to Mick. |
brentworden |
Release 1.2 – 2008-02-24
| Type |
Changes |
By |
|
Fixed numerous warnings in test code. |
luc |
|
Use the initial guess provided by the user in BrentSolver.solve(), thus
improving speed. Fixes MATH-156. Thanks to Tyler Ward. |
luc |
|
Added the estimation, optimization, geometry and ode packages from the
Mantissa library. |
luc |
|
Made ComplexFormat format double values with a provided NumberFormat
instance instead of using the real part format for all values. Fixes MATH-18. Thanks to Phil Steitz. |
brentworden |
|
Added Pascal distribution implementation. Fixes MATH-120. Thanks to Todd C. Parnell. |
psteitz |
|
Added QR Decomposition. Fixes MATH-148. Thanks to Joni Salonen. |
psteitz |
|
Modified ProperFractionFormat to reject embedded minus signs. Fixes MATH-60. Thanks to Nhung Nnguyen. |
psteitz |
|
Added a nextAfter method in MathUtils to return the next
machine-representable number in a specified direction from a given
floating point number. Used this to ensure that MathUtils.round does
not return incorrect results for numbers with bad IEEE754
representations. Fixes MATH-151. Thanks to Luc Maisonobe. |
psteitz |
|
Added Fast Fourier Transform implementation. Fixes MATH-140. Thanks to Xiaogang Zhang. |
psteitz |
|
Modified getSumSquaredErrors method in SimpleRegression to always
return a non-negative result. Fixes MATH-85. Thanks to Mark Osborn, Luc Maisonobe. |
psteitz |
|
Corrected nextInt and nextLong to handle wide value ranges. Fixes MATH-153. Thanks to Remi Arntzen. |
brentworden |
|
Increased default precision of Gamma and Beta functions. Fixes MATH-166. Thanks to Lukas Theussl. |
psteitz |
|
Added log function to MathUtils. Fixes MATH-158. Thanks to Hasan Diwan. |
psteitz |
|
Added two sample (binned comparison) ChiSquare test. Fixes MATH-160. Thanks to Matthias Hummel. |
psteitz |
|
Modified NormalDistributionImpl.cumulativeProbablity to catch
MaxIterationsExceededException and return 0 or 1, resp. if the argument
is more than 20 standard deviations from the mean. Fixes MATH-167. |
psteitz |
|
Added SynchronizedDescriptiveStatistics class. Fixes MATH-170. Thanks to David J. M. Karlsen. |
brentworden |
|
Added addAndCheck, mulAndCheck, and subAndCheck MathUtils methods for
long integer arguments. Fixes MATH-154. Thanks to Remi Arntzen. |
brentworden |
|
Merged most functions from ComplexUtils into Complex class, added
static factory method to Complex. Fixes MATH-171. Thanks to Niall Pemberton. |
psteitz |
|
Deprecated abstract factory methods and made DescriptiveStatistics and
and SummaryStatistics concrete classes. Pushed implementations up
from DescriptiveStatisticsImpl, SummaryStatisticsImpl. Made
implementations of statistics configurable via setters. |
psteitz |
|
Changed Mean.evaluate() to use a two-pass algorithm, improving accuracy
by exploiting the the fact that this method has access to the full
array of data values. Fixes MATH-174. |
psteitz |
|
Added check and rescaling of expected counts to sum to sum of expected
counts if necessary in ChiSquare test. Fixes MATH-175. Thanks to Carl Anderson. |
psteitz |
|
Handle multiplication of Complex numbers with infinite parts specially. Fixes MATH-164. |
luc |
|
Add errors guessing to least-squares estimators. Fixes MATH-176. Thanks to Kazuhiro Koshino. |
luc |
|
Add tests for Fraction constructor using double parameter. Fixes MATH-179. Thanks to Niall Pemberton. |
luc |
|
Added one-way ANOVA implementation. Fixes MATH-173. Thanks to Bob MacCallum. |
psteitz |
|
Add Fraction constructor using max denominator value. Fixes MATH-181. Thanks to Niall Pemberton. |
luc |
|
Add integer overflow checks in Fraction constructor using double parameter. Fixes MATH-182. |
luc |
|
Throw EOFException when using empty files with ValueServer in replay and
digest modes. Fixes MATH-185. |
luc |
|
Added a equals and hash methods in MathUtils to check for double arrays |
luc |
|
Added an angle normalization method in MathUtils to force angles in some
user-defined interval |
luc |
|
Added vectorial covariance computation (either sample or population
covariance) |
luc |
|
Added multivariate summary statistics. |
luc |
|
Added getSumOfLogs method to SummaryStatistics and made SumOfLogs
instance used by GeometricMean configurable. Fixes MATH-191. |
psteitz |
|
Fixed AbstractIntegerDistribution cumulativeProbablility(-,-)
to correctly handle double arguments. Fixes MATH-184. Thanks to Yegor Bryukhov. |
psteitz |
|
Made numerator and denominator final in Fraction and
deprecated protected real and imaginary parts fields in Complex,
making Fraction immutable and preparing Complex to become fully
immutable in 2.0. Fixes MATH-188. Thanks to Sebastian Bazley. |
psteitz |
Release 1.1 – 2005-12-17
| Type |
Changes |
By |
|
Made NewtonSolver derivative field transient and implemented readObject to
initialize. Fixes MATH-74. |
psteitz |
|
Made sampleStats field private and changed getUpperBounds to return a fresh
copy in EmpiricalDistributionImpl. Fixes MATH-74. |
psteitz |
|
Added polar2Complex method to ComplexUtils to create Complex numbers
from polar representations. |
psteitz |
|
Made all serialVersionUIDs private. Fixes MATH-49. Thanks to Elliotte Harold. |
psteitz |
|
Improved documentation and test cases related to handling of infinite
and NaN values in Complex, ComplexUtils classes. Fixes MATH-5. |
psteitz |
|
Fixed incorrect NaN handling in o.a.m.s.d.rank.Min, Max. Fixes MATH-57. Thanks to Mauro Talevi. |
psteitz |
|
Changed RealMatrixImpl.equals to use Double.doubleToLongBits to compare
corresponding matrix entries. Fixes MATH-74. |
psteitz |
|
Eliminated floating point equals comparison in Percentile.evaluate. Fixes MATH-74. |
psteitz |
|
Eliminated unnecessary assignment statements in Skewness.getResult
method. Fixes MATH-74. |
psteitz |
|
Synchronized getters in ResizeableDoubleArray. Fixes MATH-74. |
psteitz |
|
Eliminated unnecessary assignment statement in BisectionSolver.solve
method. Fixes MATH-74. |
psteitz |
|
Implemented hashCode in the Complex class and changed the semantics of
equals to make all instances with real or imaginary part NaN equal. Fixes MATH-74. |
psteitz |
|
Fixed bin index overflow problem in EmpiricalDistributionImpl. Fixes MATH-12. Thanks to Keith McDonald. |
psteitz |
|
Added protection against numerical overflow and underflow in the
isBracketing method. Fixes MATH-108. Thanks to Xiaogang Zhang. |
brentworden |
|
Fixed division by zero error in rounding methods. Fixes MATH-47. Thanks to Nikhil Gupte. |
brentworden |
|
Added upper tail cumulative probability method to HypergeometricDistributionImpl. Fixes MATH-100. Thanks to Mike Hu. |
brentworden |
|
Added better handling of numerical overflow and division by zero in
Complex calculations. Fixes MATH-22. Thanks to Xiaogang Zhang. |
brentworden |
|
Changed ContinuedFraction to better handle infinite convergents that
resulted in divergent continued fraction evaluations. Fixes MATH-92. Thanks to Mikael Weigelt. |
brentworden |
|
Changed rounding methods to not rely on BigDecimal conversions which
was causing numerical error. Fixes MATH-32. Thanks to Srinivas Vemury. |
brentworden |
|
Changed Fraction(double) to correctly handle near-integral arguments. Fixes MATH-3. Thanks to Jörg Weimar. |
psteitz |
|
Changed lcm to throw ArithmeticException (instead of returning bogus
value) if the result is too large to store as an integer. Fixes MATH-143. Thanks to Jörg Weimar. |
psteitz |
|
Added factories for TTest, ChiSquareTest and TestUtils class with
static methods to create instances and execute tests. Fixes MATH-70. Thanks to Mary Ellen Foster. |
psteitz |
|
Eliminated repeated endpoint function evaluations in BrentSolver, SecantSolver. Fixes MATH-95. Thanks to Paul Field. |
psteitz |
|
Added setSubMatrix methods to RealMatrixImpl, BigMatrixImpl. To
Preserve backward compatibility with version 1.0, these methods were
not added to the RealMatrix, BigMatrix interfaces. Fixes MATH-137. Thanks to Rodrigo di Lorenzo Lopes. |
psteitz |
|
Added createXIdentityMatrix methods to MatrixUtils and deprecated
getIdentity methods in RealMatrixImpl, BigMatrixImpl.
Modified RealMatrixImpl, BigMatrixImpl constructors to throw
IllegalArgumentExceptions instead of ArrayIndexOutOfBounds when
dimension arguments are not positive. |
psteitz |
|
Made PRNG pluggable for classes in the random package. Added
RandomGenerator interface extracted from java.util.random and abstract
implementation, AbstractRandomGenerator providing default
implementations of methods based on nextDouble(). Added a constructor
taking a RandomGenerator as an argument to RandomDataImpl. Changed
ValueServer to use a RandomData in its constructor. Changes to
1.0 classes should be backward compatible (including serialization). |
psteitz |
|
Added utility methods for overflow-checked integer arithmetic and
improved gcd method in MathUtils. Thanks to C. Scott Ananian. |
psteitz |
|
Fixed error in TTestImpl.homoscedasticTtest. Implementation was
incorrectly using heteroscedastic t statistic. Also improved
sensitivity of test cases. Fixes MATH-79. Thanks to Gilles Gaillard. |
psteitz |
|
Fixed javadoc errors. One-sided t-test significance adjustment was
reversed in javadoc for boolean-valued test methods. Fixes MATH-44. Thanks to Gilles Gaillard. |
psteitz |
|
Fixed bug in PolynomialSplineFunction to allow evaluation of the
function at the last knot point. Thanks to Ben Litchfield. |
brentworden |
|
Added Weibull distribution implementation. |
brentworden |
|
Added Cauchy distribution implementation. |
brentworden |
|
Added convenience methods for rounding. |
brentworden |
|
Added Fraction class based on commons-lang implementation. With the
fraction class, FractionFormat and ProperFractionFormat classes were
added to provide fraction formatting and parsing. Thanks to C. Scott Ananian. |
brentworden |
Release 1.0 – 2004-12-06
No changes in this release.
|
