com.rapidminer.tools.math
Class ContingencyTableTools

java.lang.Object
  com.rapidminer.tools.math.ContingencyTableTools

public class ContingencyTableTools
extends java.lang.Object

This class provides some helper tool for calculations around contingency tables like chi-squared tests etc.

Author:

Ingo Mierswa

Constructor Summary

ContingencyTableTools()

Method Summary

static double[][]	deleteEmpty(double[][] matrix) This method deletes all zero rows and columns.
static double	getChiSquaredStatistics(double[][] matrix, boolean useYatesCorrection) This method calculates the chi-squared statistic for the given contingency table.
static double	symmetricalUncertainty(double[][] matrix) Calculates the symmetrical uncertainty.

Methods inherited from class java.lang.Object

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

Constructor Detail

ContingencyTableTools

public ContingencyTableTools()

Method Detail

getChiSquaredStatistics

public static double getChiSquaredStatistics(double[][] matrix,
                                             boolean useYatesCorrection)

This method calculates the chi-squared statistic for the given contingency table.

deleteEmpty

public static double[][] deleteEmpty(double[][] matrix)

This method deletes all zero rows and columns.

symmetricalUncertainty

public static double symmetricalUncertainty(double[][] matrix)

Calculates the symmetrical uncertainty.