org.apache.mahout.math.jet.random

Class Poisson

java.lang.Object

org.apache.mahout.math.function.DoubleFunction

org.apache.mahout.math.jet.random.AbstractDistribution

org.apache.mahout.math.jet.random.AbstractDiscreteDistribution

org.apache.mahout.math.jet.random.Poisson

All Implemented Interfaces:

IntFunction

public final class Poisson
extends AbstractDiscreteDistribution

Partially deprecated until unit tests are in place. Until this time, this class/interface is unsupported.

Constructor Summary

Constructors

Constructor and Description
Poisson(double mean, Random randomGenerator) Constructs a poisson distribution.

Method Summary

Methods

Modifier and Type	Method and Description
int	nextInt()
int	nextInt(double theMean) Returns a random number from the distribution; bypasses the internal state.

Methods inherited from class org.apache.mahout.math.jet.random.AbstractDiscreteDistribution

nextDouble

Methods inherited from class org.apache.mahout.math.jet.random.AbstractDistribution

apply, apply, getRandomGenerator, randomDouble, setRandomGenerator

Methods inherited from class org.apache.mahout.math.function.DoubleFunction

isDensifying

Methods inherited from class java.lang.Object

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

Constructor Detail

Poisson

public Poisson(double mean,
       Random randomGenerator)

Constructs a poisson distribution. Example: mean=1.0.

Method Detail

nextInt

public int nextInt()

Specified by:

nextInt in class AbstractDistribution

Returns:

A random number from the distribution; returns (int) Math.round(nextDouble()). Override this method if necessary.

nextInt

public int nextInt(double theMean)

Returns a random number from the distribution; bypasses the internal state.