EntropySplitCrit (weka-dev 3.9.7 API)

java.lang.Object
- weka.classifiers.trees.j48.SplitCriterion
- - weka.classifiers.trees.j48.EntropyBasedSplitCrit
  - - weka.classifiers.trees.j48.EntropySplitCrit

All Implemented Interfaces:

Serializable, RevisionHandler
```
public final class EntropySplitCrit
extends EntropyBasedSplitCrit
```
Class for computing the entropy for a given distribution.

Version:

$Revision$

Author:

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

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor Description

EntropySplitCrit()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`String`	`getRevision()`	Returns the revision string.
`double`	`splitCritValue(Distribution bags)`	Computes entropy for given distribution.
`double`	`splitCritValue(Distribution train, Distribution test)`	Computes entropy of test distribution with respect to training distribution.

Methods inherited from class weka.classifiers.trees.j48.EntropyBasedSplitCrit
lnFunc, newEnt, oldEnt, splitEnt

Methods inherited from class weka.classifiers.trees.j48.SplitCriterion
splitCritValue, splitCritValue

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

- Constructor Detail
  - EntropySplitCrit
```
public EntropySplitCrit()
```
- Method Detail
  - splitCritValue
```
public final double splitCritValue(Distribution bags)
```
    Computes entropy for given distribution.
    
    Overrides:
    
    splitCritValue in class SplitCriterion
    
    Returns:
    
    value of splitting criterion. 0 by default
  - splitCritValue
```
public final double splitCritValue(Distribution train,
                                   Distribution test)
```
    Computes entropy of test distribution with respect to training distribution.
    
    Overrides:
    
    splitCritValue in class SplitCriterion
    
    Returns:
    
    value of splitting criterion. 0 by default
  - getRevision
```
public String getRevision()
```
    Returns the revision string.
    
    Returns:
    
    the revision