de.aitools.dm.clustering.validation.external
Class Q

java.lang.Object
  de.aitools.dm.clustering.validation.ExternalValidationMeasure
      de.aitools.dm.clustering.validation.external.Q

public class Q
extends ExternalValidationMeasure

Implementation of Q$_2$ (normalization of Q$_0$). References:

   B.~E. Dom, 2001. 
   An Information-Theoretic External Cluster-Validity Measure.
 

Version:

$Id: Q.java,v 1.1 2011/03/22 14:59:05 hoppe Exp $

Author:

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

Constructor Summary

Q()

Method Summary

double	measure(Matrix contingencyTable) Perform consecutive clustering evaluations in a more efficient manner.
double	Q_Zero(Matrix contingencyTable)

Methods inherited from class de.aitools.dm.clustering.validation.ExternalValidationMeasure

measure

Methods inherited from class java.lang.Object

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

Constructor Detail

Q

public Q()

Method Detail

measure

public double measure(Matrix contingencyTable)

Description copied from class: ExternalValidationMeasure

Perform consecutive clustering evaluations in a more efficient manner.

Specified by:

measure in class ExternalValidationMeasure

Parameters:

contingencyTable - a precomputed contincengy table

Returns:

Q_Zero

public double Q_Zero(Matrix contingencyTable)