EntropyBasedSplitCrit (DiscriminationAwareProcessAnalysis)

java.lang.Object
- org.processmining.plugins.workshop.Yaguang.WekaDiscriminationTree.SplitCriterion
- - org.processmining.plugins.workshop.Yaguang.WekaDiscriminationTree.EntropyBasedSplitCrit

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

GainRatioSplitCrit, InfoGainSplitCrit
```
public abstract class EntropyBasedSplitCrit
extends SplitCriterion
```
"Abstract" class for computing splitting criteria based on the entropy of a class distribution.

Version:

$Revision: 1.5 $

Author:

Eibe Frank (eibe@cs.waikato.ac.nz)

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type Field Description

protected static double log2
The log of 2.

Constructor Summary

Constructors
Constructor Description

EntropyBasedSplitCrit()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`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 org.processmining.plugins.workshop.Yaguang.WekaDiscriminationTree.SplitCriterion
splitCritValue, splitCritValue, splitCritValue, splitCritValue

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - log2
```
protected static double log2
```
    The log of 2.
- Constructor Detail
  - EntropyBasedSplitCrit
```
public EntropyBasedSplitCrit()
```
- Method Detail
  - 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.