de.lmu.ifi.dbs.elki.math.statistics.distribution

Interface Distribution

All Known Subinterfaces:

DistributionWithRandom

All Known Implementing Classes:

BetaDistribution, CauchyDistribution, ChiDistribution, ChiSquaredDistribution, ConstantDistribution, ExponentialDistribution, ExponentiallyModifiedGaussianDistribution, GammaDistribution, HaltonUniformDistribution, LogGammaDistribution, LogNormalDistribution, NormalDistribution, PoissonDistribution, StudentsTDistribution, UniformDistribution

public interface Distribution

Statistical distributions, with their common functions. See DistributionWithRandom for distributions that also have a random generator included.

Method Summary

Methods

Modifier and Type	Method and Description
double	cdf(double val) Return the cumulative density function at the given value.
double	pdf(double val) Return the density of an existing value
double	quantile(double val) Quantile aka probit (for normal) aka inverse CDF (invcdf, cdf^-1) function.
String	toString() Describe the distribution

Method Detail

pdf

double pdf(double val)

Return the density of an existing value

Parameters:

val - existing value

Returns:

distribution density

cdf

double cdf(double val)

Return the cumulative density function at the given value.

Parameters:

val - existing value

Returns:

cumulative density

quantile

double quantile(double val)

Quantile aka probit (for normal) aka inverse CDF (invcdf, cdf^-1) function.

Parameters:

val - Quantile to find

Returns:

Quantile position

toString

String toString()

Describe the distribution

Overrides:

toString in class Object

Returns:

description