com.numericalmethod.suanshu.analysis.function.special
Class Beta

java.lang.Object
  com.numericalmethod.suanshu.analysis.function.rn2r1.BivariateRealFunction
      com.numericalmethod.suanshu.analysis.function.special.Beta

All Implemented Interfaces:

Function, RealScalarFunction

public class Beta
extends BivariateRealFunction

This class represents the Beta function B(x, y).

             Γ(x)Γ(y)    /1
 B(x, y) = ----------- = | tx-1 (1 - t)y - 1 dt
              Γ(x+y)     /0
 

x > 0, y > 0

The R equivalent function is beta.

See Also:

Wikipedia: Beta function

Nested Class Summary

Nested classes/interfaces inherited from interface com.numericalmethod.suanshu.analysis.function.Function

Function.EvaluationException

Constructor Summary

Beta()

Method Summary

double

evaluate(double x, double y) Compute B(x, y).

Methods inherited from class com.numericalmethod.suanshu.analysis.function.rn2r1.BivariateRealFunction

dimension4Domain, dimension4Range, evaluate

Methods inherited from class java.lang.Object

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

Constructor Detail

Beta

public Beta()

Method Detail

evaluate

public double evaluate(double x,
                       double y)

Compute B(x, y).

Specified by:

evaluate in class BivariateRealFunction

Parameters:

x - x > 0

y - y > 0

Returns:

B(x, y)