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java.lang.Objectweka.classifiers.trees.j48.SplitCriterion
weka.classifiers.trees.j48.EntropyBasedSplitCrit
public abstract class EntropyBasedSplitCrit
"Abstract" class for computing splitting criteria based on the entropy of a class distribution.
Constructor Summary | |
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EntropyBasedSplitCrit()
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Method Summary | |
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double |
logFunc(double num)
Help method for computing entropy. |
double |
newEnt(Distribution bags)
Computes entropy of distribution after splitting. |
double |
oldEnt(Distribution bags)
Computes entropy of distribution before splitting. |
double |
splitEnt(Distribution bags)
Computes entropy after splitting without considering the class values. |
Methods inherited from class weka.classifiers.trees.j48.SplitCriterion |
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splitCritValue, splitCritValue, splitCritValue, splitCritValue |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public EntropyBasedSplitCrit()
Method Detail |
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public final double logFunc(double num)
public final double oldEnt(Distribution bags)
public final double newEnt(Distribution bags)
public final double splitEnt(Distribution bags)
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