org.ojalgo.random
Class Poisson

java.lang.Object
  java.lang.Number
      org.ojalgo.random.RandomNumber
          org.ojalgo.random.Poisson

All Implemented Interfaces:

Serializable, Function<Double>, NullaryFunction<Double>, DiscreteDistribution, Distribution

public class Poisson
extends RandomNumber

Distribution of number of points in random point process under certain simple assumptions. Approximation to the binomial distribution when aCount is large and aProbability is small. aLambda = aCount * aProbability.

Author:

apete

See Also:

Serialized Form

Constructor Summary

Poisson()

Poisson(double aLambda)

Method Summary

double	getExpected()
double	getProbability(int aVal) Probability density function
double	getVariance() Subclasses must override either getStandardDeviation() or getVariance()!

Methods inherited from class org.ojalgo.random.RandomNumber

doubleValue, floatValue, getStandardDeviation, intValue, invoke, longValue, toString

Methods inherited from class java.lang.Number

byteValue, shortValue

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.ojalgo.random.Distribution

getStandardDeviation

Constructor Detail

Poisson

public Poisson()

Poisson

public Poisson(double aLambda)

Method Detail

getExpected

public double getExpected()

getProbability

public double getProbability(int aVal)

Description copied from interface: DiscreteDistribution

Probability density function

getVariance

public double getVariance()

Description copied from class: RandomNumber

Subclasses must override either getStandardDeviation() or getVariance()!

Specified by:

getVariance in interface Distribution

Overrides:

getVariance in class RandomNumber

See Also:

Distribution.getStandardDeviation(), Distribution.getVariance()