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java.lang.Objectweka.classifiers.trees.j48.SplitCriterion
weka.classifiers.trees.j48.EntropyBasedSplitCrit
"Abstract" class for computing splitting criteria based on the entropy of a class distribution.
| Constructor Summary | |
EntropyBasedSplitCrit()
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| Method Summary | |
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 |
splitCritValue, splitCritValue, splitCritValue, splitCritValue |
| Methods inherited from class java.lang.Object |
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
public EntropyBasedSplitCrit()
| Method Detail |
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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