| Type |
Changes |
By |
|---|
 |
Added robust locally weighted regression (Loess). Fixes MATH-278
. Thanks to Eugene Kirpichov. |
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 minimization sub-package below the analysis 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
|
| 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
|
| 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 evalutations 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
|
