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Class weka.classifiers.j48.EntropyBasedSplitCrit 

java.lang.Object
   |
   +----weka.classifiers.j48.SplitCriterion
           |
           +----weka.classifiers.j48.EntropyBasedSplitCrit
public abstract class EntropyBasedSplitCrit
extends SplitCriterion
"Abstract" class for computing splitting criteria based on the entropy of a class distribution.

Version:
$Revision: 1.2 $
Author:
Eibe Frank (eibe@cs.waikato.ac.nz)

Constructor Index

o EntropyBasedSplitCrit()

Method Index

o newEnt(Distribution)
Computes entropy of distribution after splitting.
o oldEnt(Distribution)
Computes entropy of distribution before splitting.
o splitEnt(Distribution)
Computes entropy after splitting without considering the class values.

Constructors

o EntropyBasedSplitCrit 
 public EntropyBasedSplitCrit()

Methods

o oldEnt 
 public final double oldEnt(Distribution bags)
Computes entropy of distribution before splitting.

o newEnt 
 public final double newEnt(Distribution bags)
Computes entropy of distribution after splitting.

o splitEnt 
 public final double splitEnt(Distribution bags)
Computes entropy after splitting without considering the class values. 

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