Package org.apache.commons.numbers.gamma

Class Gamma

java.lang.Object

org.apache.commons.numbers.gamma.Gamma

public final class Gamma
extends Object

Gamma function \( \Gamma(x) \).

The gamma function can be seen to extend the factorial function to cover real and complex numbers, but with its argument shifted by -1. This implementation supports real numbers.

This code has been adapted from:

• The Boost c++ implementation <boost/math/special_functions/gamma.hpp>.
• The NSWC Library of Mathematics Subroutines double precision implementation, DGAMMA.

See Also:

• Boost C++ Gamma functions

Method Summary

Modifier and Type	Method	Description
static double	value(double x)	Computes the value of \( \Gamma(x) \).

Methods inherited from class java.lang.Object

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

Method Details

value

public static double value(double x)

Computes the value of \( \Gamma(x) \).

Parameters:

x - Argument.

Returns:

\( \Gamma(x) \)