de.aitools.aq.algebra
Class Algebra

java.lang.Object
  de.aitools.aq.algebra.Algebra

public class Algebra
extends java.lang.Object

Version:

$Id: Algebra.java,v 1.2 2011/04/14 13:10:44 hoppe Exp $

Author:

dennis.hoppe(/\t)uni-weimar.de

Constructor Summary

Algebra()

Method Summary

static Matrix	computeContingencyTable(int[] classAssignment, int[] clusterAssignment) Contingency table for comparing two partitions.
static Matrix	computePairwiseContingencyTable(Matrix contingencyTable) Pairwise contingency table.
static double[]	getColumnSums(Matrix matrix)
static double[]	getRowSums(Matrix matrix)
static Matrix	toMatrix(int[] assignment)

Methods inherited from class java.lang.Object

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

Constructor Detail

Algebra

public Algebra()

Method Detail

getColumnSums

public static double[] getColumnSums(Matrix matrix)

getRowSums

public static double[] getRowSums(Matrix matrix)

computeContingencyTable

public static Matrix computeContingencyTable(int[] classAssignment,
                                             int[] clusterAssignment)

Contingency table for comparing two partitions. References:

   K.~Y. Yeung and W.~L. Russo, 2010.
   Details of the Adjusted Rand index and Clustering algorithms Supplement
   to the paper 'An empirical study on Principal Component Analysis for 
   clustering gene expression data'.
 

Parameters:

classAssignment -

clusterAssignment -

Returns:

toMatrix

public static Matrix toMatrix(int[] assignment)

computePairwiseContingencyTable

public static Matrix computePairwiseContingencyTable(Matrix contingencyTable)

Pairwise contingency table.

                  | Same Cluster | Different Cluster |
 ----------------- -------------- -------------------
 Same Class       |     f_11     |       f_10        |
 Different Class  |     f_01     |       f_00        |
 ----------------- -------------- -------------------
 

Parameters:

contingencyTable -

Returns: