com.numericalmethod.suanshu.stats.random.univariate.poisson

Class Knuth1969

java.lang.Object

com.numericalmethod.suanshu.stats.random.univariate.poisson.Knuth1969

All Implemented Interfaces:

RandomNumberGenerator, java.io.Serializable

public class Knuth1969
extends java.lang.Object
implements RandomNumberGenerator

This is a random number generator that generates random deviates according to the Poisson distribution.

See Also:

Wikipedia: Generating Poisson-distributed random variables, Serialized Form

Constructor Summary

Constructors

Constructor and Description
Knuth1969(double lambda) Construct a random number generator to sample from the Poisson distribution.
Knuth1969(double lambda, RandomLongGenerator uniform) Construct a random number generator to sample from the Poisson distribution.

Method Summary

Modifier and Type	Method and Description
double	nextDouble() Get the next random double.
void	seed(long... seeds) Seed the random number generator to produce repeatable sequences.

Methods inherited from class java.lang.Object

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

Constructor Detail

Knuth1969

public Knuth1969(double lambda,
                 RandomLongGenerator uniform)

Construct a random number generator to sample from the Poisson distribution.

Parameters:

lambda - the shape parameter

uniform - a uniform random number generator

Knuth1969

public Knuth1969(double lambda)

Construct a random number generator to sample from the Poisson distribution.

Parameters:

lambda - the shape parameter

Method Detail

seed

public void seed(long... seeds)

Description copied from interface: RandomNumberGenerator

Seed the random number generator to produce repeatable sequences.

Specified by:

seed in interface RandomNumberGenerator

Parameters:

seeds - the seeds

nextDouble

public double nextDouble()

Description copied from interface: RandomNumberGenerator

Get the next random double.

Specified by:

nextDouble in interface RandomNumberGenerator

Returns:

the next random number