RandomStraightLinePointGenerator (Commons Math 3.2 Test API)

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org.apache.commons.math3.optimization.general
Class RandomStraightLinePointGenerator

java.lang.Object
  org.apache.commons.math3.optimization.general.RandomStraightLinePointGenerator

public class RandomStraightLinePointGenerator
extends Object
extends Object

Factory for generating a cloud of points that approximate a straight line.

Constructor Summary
`RandomStraightLinePointGenerator(double a, double b, double sigma, double lo, double hi, long seed)` The generator will create a cloud of points whose x-coordinates will be randomly sampled between `xLo` and `xHi`, and the corresponding y-coordinates will be computed as `y = a x + b + N(0, error)` where `N(mean, sigma)` is a Gaussian distribution with the given mean and standard deviation.

Method Summary
`Point2D.Double[]`	`generate(int n)` Point generator.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

RandomStraightLinePointGenerator

public RandomStraightLinePointGenerator(double a,
                                        double b,
                                        double sigma,
                                        double lo,
                                        double hi,
                                        long seed)

The generator will create a cloud of points whose x-coordinates will be randomly sampled between xLo and xHi, and the corresponding y-coordinates will be computed as


  y = a x + b + N(0, error)

where N(mean, sigma) is a Gaussian distribution with the given mean and standard deviation.

Parameters:: a - Slope.; b - Intercept.; sigma - Standard deviation on the y-coordinate of the point.; lo - Lowest value of the x-coordinate.; hi - Highest value of the x-coordinate.; seed - RNG seed.

Method Detail

generate

public Point2D.Double[] generate(int n)

Point generator.

Parameters:: n - Number of points to create.
Returns:: the cloud of n points.