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

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

public class NormalizedEntropy
extends ExternalValidationMeasure

References:

   Ying Zhao and George Karypis, 2001.
   Criterion functions for ducument clustering: Experiments and analysis.
 

Version:

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

Author:

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

Constructor Summary

NormalizedEntropy()

Method Summary

static double	log2(double value)
double	measure(Matrix contingencyTable) Perform consecutive clustering evaluations in a more efficient manner.

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

NormalizedEntropy

public NormalizedEntropy()

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:

log2

public static double log2(double value)