drasys.or
Class Functions

java.lang.Object
  |
  +--drasys.or.Functions

Direct Known Subclasses:

IncompleteBeta, IncompleteGamma

public class Functions

extends java.lang.Object

implements FunctionsI, java.io.Serializable

A class containing common functions not supplied in 'java.lang.Math'.

See Also:

Serialized Form

Constructor Summary

Functions()

 

Method Summary
double	binomialCoefficient(int n, int k)           Returns the binomial coefficient: n!/(k!*(n-k)!)
double	lnFactorial(int x)           Returns the natural logarithm of x factorial 'y = ln(x!)'.
double	lnGamma(double x)           Returns the natural logarithm of the gama function of x 'y = ln(gama(x))'.

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

Functions

public Functions()

binomialCoefficient

public double binomialCoefficient(int n,
                                  int k)

Returns the binomial coefficient: n!/(k!*(n-k)!)

Specified by:

binomialCoefficient in interface FunctionsI

lnGamma

public double lnGamma(double x)

Returns the natural logarithm of the gama function of x 'y = ln(gama(x))'.

Specified by:

lnGamma in interface FunctionsI

lnFactorial

public double lnFactorial(int x)

Returns the natural logarithm of x factorial 'y = ln(x!)'.

Specified by:

lnFactorial in interface FunctionsI