Class Beta

java.lang.Object

eduni.distributions.Generator

eduni.distributions.Beta

All Implemented Interfaces:

ContinuousGenerator, Seedable

Direct Known Subclasses:

BetaPrime

public class Beta
extends Generator
implements ContinuousGenerator

A random number generator based on the beta distribution.

Version:

1.0, 2 October 2002

Author:

F.Mallet from Costas Simatos's original

Field Summary

Fields

Modifier and Type	Field	Description
protected double	shape_a
protected double	shape_b

Fields inherited from class Generator

distrib

Constructor Summary

Constructors

Constructor	Description
Beta(double shape_a, double shape_b)	the seed is automatically provided by the SeedGenerator
Beta(double shape_a, double shape_b, long seed)	The constructor with which a specific seed is set for the random number generator

Method Summary

Modifier and Type	Method	Description
double	sample()	Generate a new random number.

Methods inherited from class Generator

getSeed, reseed, setSeed

Methods inherited from class Object

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

Methods inherited from interface Seedable

getSeed, reseed, setSeed

Field Details

shape_a

protected double shape_a

shape_b

protected double shape_b

Constructor Details

Beta

public Beta(double shape_a,
 double shape_b)

the seed is automatically provided by the SeedGenerator

Parameters:

shape_a - The a shape parameter of the distribution

shape_b - The b shape parameter of the distribution

Beta

public Beta(double shape_a,
 double shape_b,
 long seed)

The constructor with which a specific seed is set for the random number generator

Parameters:

shape_a - The a shape parameter of the distribution

shape_b - The b shape parameter of the distribution

seed - The initial seed for the generator, two instances with the same seed will generate the same sequence of numbers

Method Details

sample

public double sample()

Generate a new random number.

Specified by:

sample in interface ContinuousGenerator

Returns:

The next random number in the sequence