pal.statistics
Class FisherExact

java.lang.Object
  pal.statistics.FisherExact

public class FisherExact
extends java.lang.Object

This does a one tail fisher exact test. It uses an array of factorials initialized at the beginning to provide speed. There could be better ways to do this.

Version:

$Id: FisherExact.java,v 1

Author:

Ed Buckler

Constructor Summary

FisherExact(int maxSize)
constructor for FisherExact table

Method Summary

double	getCumlativeP(int a, int b, int c, int d) calculates the one tail P-value for the Fisher Exact test This
double	getP(int a, int b, int c, int d) calculates the P-value for this specific state

Methods inherited from class java.lang.Object

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

Constructor Detail

FisherExact

public FisherExact(int maxSize)

constructor for FisherExact table

Parameters:

maxSize - is the maximum sum that will be encountered by the table (a+b+c+d)

Method Detail

getP

public final double getP(int a,
                         int b,
                         int c,
                         int d)

calculates the P-value for this specific state

Parameters:

a,b,c,d - are the four cells in a 2x2 matrix

Returns:

the P-value

getCumlativeP

public final double getCumlativeP(int a,
                                  int b,
                                  int c,
                                  int d)

calculates the one tail P-value for the Fisher Exact test This

Parameters:

a,b,c,d - are the four cells in a 2x2 matrix

Returns:

the P-value