edu.cmu.minorthird.classify.transform
Class ContingencyTable

java.lang.Object
  edu.cmu.minorthird.classify.transform.ContingencyTable

public class ContingencyTable
extends java.lang.Object

Author:

Vitor Carvalho March 2005 A 2-by-2 matrix indicating the association between 2 variables. Useful in feature selection or feature association experiments. Contains scores for Chi-Squared, Pointwise Mutual-Information, Compensated Pointwise Mutual Info Given 2 variables X and Y, the matrix is [a b] a = X and Y ; b = X and Not Y [c d] c = Not X and Y; d = Not X and Not Y

Constructor Summary

ContingencyTable(long a, long b, long c, long d)

Method Summary

double	getChiSquared()
double	getCompensatedPMutualInfo(int count)
double	getPMutualInfo()
static void	main(java.lang.String[] args)
java.lang.String	toString()
long	total()

Methods inherited from class java.lang.Object

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

Constructor Detail

ContingencyTable

public ContingencyTable(long a,
                        long b,
                        long c,
                        long d)

Method Detail

getChiSquared

public double getChiSquared()

getPMutualInfo

public double getPMutualInfo()

getCompensatedPMutualInfo

public double getCompensatedPMutualInfo(int count)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

total

public long total()

main

public static void main(java.lang.String[] args)