be.ac.ulg.montefiore.run.distributions
Class PoissonDistribution

java.lang.Object
  be.ac.ulg.montefiore.run.distributions.PoissonDistribution

All Implemented Interfaces:

DiscreteDistribution, java.io.Serializable

public class PoissonDistribution
extends java.lang.Object
implements DiscreteDistribution

This class implements a generator of Poisson distributed numbers.

See Also:

Serialized Form

Constructor Summary

PoissonDistribution(double mean)
Creates a new pseudo-random Poisson distribution.

Method Summary

int	generate() Generates a pseudo-random number.
double	mean() Returns this distribution's mean.
double	probability(int n) Returns the probability of a given number.

Methods inherited from class java.lang.Object

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

Constructor Detail

PoissonDistribution

public PoissonDistribution(double mean)

Creates a new pseudo-random Poisson distribution.

Parameters:

mean - The mean duration between two consecutive events.

Method Detail

mean

public double mean()

Returns this distribution's mean.

Returns:

This distribution's mean.

generate

public int generate()

Description copied from interface: DiscreteDistribution

Generates a pseudo-random number. The numbers generated by this function are drawn according to the pseudo-random distribution described by the object that implements it.

Specified by:

generate in interface DiscreteDistribution

Returns:

A pseudo-random number.

probability

public double probability(int n)

Description copied from interface: DiscreteDistribution

Returns the probability of a given number.

Specified by:

probability in interface DiscreteDistribution

Parameters:

n - An integer.