weka.classifiers.trees.j48
Class C45ModelSelection

java.lang.Object
  weka.classifiers.trees.j48.ModelSelection
      weka.classifiers.trees.j48.C45ModelSelection

All Implemented Interfaces:

java.io.Serializable

public class C45ModelSelection

extends ModelSelection

Class for selecting a C4.5-type split for a given dataset.

Version:

$Revision: 1.7 $y

Author:

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

See Also:

Serialized Form

Field Summary

private Instances	m_allData All the training data
private int	m_minNoObj Minimum number of objects in interval.

Constructor Summary

C45ModelSelection(int minNoObj, Instances allData)
Initializes the split selection method with the given parameters.

Method Summary

void	cleanup() Sets reference to training data to null.
ClassifierSplitModel	selectModel(Instances data) Selects C4.5-type split for the given dataset.
ClassifierSplitModel	selectModel(Instances train, Instances test) Selects C4.5-type split for the given dataset.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

m_minNoObj

private int m_minNoObj

Minimum number of objects in interval.

m_allData

private Instances m_allData

All the training data

Constructor Detail

C45ModelSelection

public C45ModelSelection(int minNoObj,
                         Instances allData)

Initializes the split selection method with the given parameters.

Parameters:

minNoObj - minimum number of instances that have to occur in at least two subsets induced by split

allData - FULL training dataset (necessary for selection of split points).

Method Detail

cleanup

public void cleanup()

Sets reference to training data to null.

selectModel

public final ClassifierSplitModel selectModel(Instances data)

Selects C4.5-type split for the given dataset.

Specified by:

selectModel in class ModelSelection

selectModel

public final ClassifierSplitModel selectModel(Instances train,
                                              Instances test)

Selects C4.5-type split for the given dataset.

Overrides:

selectModel in class ModelSelection