de.jstacs.utils.random
Class SoftOneOfN

java.lang.Object
  de.jstacs.utils.random.MultivariateRandomGenerator
      de.jstacs.utils.random.SoftOneOfN

public class SoftOneOfN
extends MultivariateRandomGenerator

This random generator returns 1-epsilon for one and equal parts for the rest of a random vector. The content of container MRGParams is never used in this class.

Author:

Jens Keilwagen

Constructor Summary

SoftOneOfN()
This constructor can be used for (hard) sampling one of n.

SoftOneOfN(double epsilon)
This constructor can be used for (soft) sampling one of n.

Method Summary

void	generate(double[] d, int start, int number) Generates an array of length number as part of the array d beginning at index start with one entry getting the value 1-epsilon and all the others equal parts of epsilon.
void	generate(double[] d, int start, int number, MRGParams p) Generates a n-dimensional random array as part of the array d beginning at start.
double[]	generate(int number) Generates an array of length number with one entry getting the value 1-epsilon and all the others equal parts of epsilon.

Methods inherited from class de.jstacs.utils.random.MultivariateRandomGenerator

generate

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SoftOneOfN

public SoftOneOfN(double epsilon)
           throws IllegalArgumentException

This constructor can be used for (soft) sampling one of n. One item will get 1-epsilon, all the others will get an equal part.

Parameters:

epsilon - the value that should be subtracted from 1 for one item

Throws:

IllegalArgumentException - if the value of epsilon is not in [0,1]

SoftOneOfN

public SoftOneOfN()

This constructor can be used for (hard) sampling one of n. One item will get 1, all the others 0.

Method Detail

generate

public void generate(double[] d,
                     int start,
                     int number,
                     MRGParams p)

Description copied from class: MultivariateRandomGenerator

Generates a n-dimensional random array as part of the array d beginning at start.

Specified by:

generate in class MultivariateRandomGenerator

Parameters:

d - the array

start - the start index for generated values

number - the dimension of the random array

p - the parameter of the underlying distribution

generate

public double[] generate(int number)

Generates an array of length number with one entry getting the value 1-epsilon and all the others equal parts of epsilon.

Parameters:

number - the length of the generated array

Returns:

array of length number with one entry getting the value 1-epsilon and all the others equal parts of epsilon

See Also:

generate(double[], int, int)

generate

public void generate(double[] d,
                     int start,
                     int number)

Generates an array of length number as part of the array d beginning at index start with one entry getting the value 1-epsilon and all the others equal parts of epsilon.

Parameters:

d - the array

start - the start index for generated values

number - the dimension of the generated array