edu.udo.cs.yale.tools.math
Class FDistribution

java.lang.Object
  edu.udo.cs.yale.tools.math.FDistribution

public class FDistribution
extends java.lang.Object

The FDistribution depends on two given degrees of freedom. It can be used to calculate the probability from the result of a significance test (i.e. the probability that a null hypothesis can be hold).

Version:

$Id: FDistribution.java,v 1.4 2006/08/03 14:39:34 ingomierswa Exp $

Author:

Ingo Mierswa

Field Summary

private int	df1
private int	df2
private static double[]	GAMMA_COEFFICIENTS

Constructor Summary

FDistribution(int df1, int df2)

Method Summary

private double	betaInv(double x1, double p, double q)
double	getProbabilityForValue(double f)
private double	lnBeta(double a, double b)
private double	lnGamma(double c)

Methods inherited from class java.lang.Object

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

Field Detail

GAMMA_COEFFICIENTS

private static final double[] GAMMA_COEFFICIENTS

df1

private int df1

df2

private int df2

Constructor Detail

FDistribution

public FDistribution(int df1,
                     int df2)

Method Detail

getProbabilityForValue

public double getProbabilityForValue(double f)

lnGamma

private double lnGamma(double c)

lnBeta

private double lnBeta(double a,
                      double b)

betaInv

private double betaInv(double x1,
                       double p,
                       double q)