org.apache.commons.math.distribution

Interface DiscreteDistribution

All Superinterfaces:

Distribution

All Known Subinterfaces:

BinomialDistribution, HypergeometricDistribution, IntegerDistribution, PascalDistribution, PoissonDistribution, ZipfDistribution

All Known Implementing Classes:

AbstractIntegerDistribution, BinomialDistributionImpl, HypergeometricDistributionImpl, PascalDistributionImpl, PoissonDistributionImpl, ZipfDistributionImpl

public interface DiscreteDistribution
extends Distribution

Base interface for discrete distributions.

Method Summary

Modifier and Type	Method and Description
double	probability(double x) For a random variable X whose values are distributed according to this distribution, this method returns P(X = x).

Methods inherited from interface org.apache.commons.math.distribution.Distribution

cumulativeProbability, cumulativeProbability

Method Detail

probability

double probability(double x)

For a random variable X whose values are distributed according to this distribution, this method returns P(X = x). In other words, this method represents the probability mass function, or PMF for the distribution.

Parameters:

x - the value at which the probability mass function is evaluated.

Returns:

the value of the probability mass function at x