dev.nm.analysis.function.special.beta

Class Beta

java.lang.Object

dev.nm.analysis.function.rn2r1.AbstractRealScalarFunction

dev.nm.analysis.function.rn2r1.AbstractBivariateRealFunction

dev.nm.analysis.function.special.beta.Beta

All Implemented Interfaces:

Function<Vector,Double>, BivariateRealFunction, RealScalarFunction

public class Beta
extends AbstractBivariateRealFunction

The beta function defined as: \[ B(x,y) = \frac{\Gamma(x)\Gamma(y)}{\Gamma(x+y)}= \int_0^1t^{x-1}(1-t)^{y-1}\,dt, x > 0, y > 0 \]

The R equivalent function is beta.

See Also:

Wikipedia: Beta function

Nested Class Summary

Nested classes/interfaces inherited from interface dev.nm.analysis.function.Function

Function.EvaluationException

Constructor Summary

Constructors

Constructor and Description
Beta()

Method Summary

Modifier and Type	Method and Description
double	evaluate(double x, double y) Evaluate B(x,y).

Methods inherited from class dev.nm.analysis.function.rn2r1.AbstractBivariateRealFunction

evaluate

Methods inherited from class dev.nm.analysis.function.rn2r1.AbstractRealScalarFunction

dimensionOfDomain, dimensionOfRange

Methods inherited from class java.lang.Object

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

Methods inherited from interface dev.nm.analysis.function.Function

dimensionOfDomain, dimensionOfRange

Constructor Detail

Beta

public Beta()

Method Detail

evaluate

public double evaluate(double x,
                       double y)

Evaluate B(x,y).

Parameters:

x - x > 0

y - y > 0

Returns:

B(x,y)