类 EntropyBasedSplitCrit

java.lang.Object
weka.classifiers.trees.j48.SplitCriterion
weka.classifiers.trees.j48.EntropyBasedSplitCrit
所有已实现的接口:
Serializable, RevisionHandler
直接已知子类:
EntropySplitCrit, GainRatioSplitCrit, InfoGainSplitCrit

public abstract class EntropyBasedSplitCrit extends SplitCriterion
"Abstract" class for computing splitting criteria based on the entropy of a class distribution.
版本:
$Revision: 1.8 $
作者:
Eibe Frank (eibe@cs.waikato.ac.nz)
另请参阅:
  • 构造器详细资料

    • EntropyBasedSplitCrit

      public EntropyBasedSplitCrit()
  • 方法详细资料

    • logFunc

      public final double logFunc(double num)
      Help method for computing entropy.
    • oldEnt

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

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

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