weka.classifiers.j48
Class ClassifierDecList

java.lang.Object
  |
  +--weka.classifiers.j48.ClassifierDecList

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

C45PruneableDecList, PruneableDecList

public class ClassifierDecList

extends java.lang.Object

implements java.io.Serializable

Class for handling a rule (partial tree) for a decision list.

Author:

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

See Also:

Serialized Form

Field Summary

protected int	indeX Which son to expand?
protected boolean	m_isEmpty True if node is empty.
protected boolean	m_isLeaf True if node is leaf.
protected ClassifierSplitModel	m_localModel Local model at node.
protected ClassifierDecList[]	m_sons References to sons.
protected Distribution	m_test The pruning instances.
protected ModelSelection	m_toSelectModel The model selection method.
protected Instances	m_train The training instances.

Constructor Summary

ClassifierDecList(ModelSelection toSelectLocModel)
Constructor - just calls constructor of class DecList.

Method Summary

void	buildDecList(Instances data, boolean leaf) Builds the partial tree without hold out set.
void	buildDecList(Instances train, Instances test, boolean leaf) Builds the partial tree with hold out set
protected int	chooseIndex() Dummy method.
protected int	chooseLastIndex() Dummy method.
double	classifyInstance(Instance instance) Classifies an instance.
void	cleanup(Instances justHeaderInfo) Cleanup in order to save memory.
double[]	distributionForInstance(Instance instance) Returns class probabilities for a weighted instance.
protected ClassifierDecList	getNewDecList(Instances train, boolean leaf) Returns a newly created tree.
protected ClassifierDecList	getNewDecList(Instances train, Instances test, boolean leaf) Returns a newly created tree.
protected void	pruneEnd() Dummy method.
java.lang.String	toString() Prints rules.
double	weight(Instance instance) Returns the weight a rule assigns to an instance.

Methods inherited from class java.lang.Object

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

Field Detail

m_toSelectModel

protected ModelSelection m_toSelectModel

The model selection method.

m_localModel

protected ClassifierSplitModel m_localModel

Local model at node.

m_sons

protected ClassifierDecList[] m_sons

References to sons.

m_isLeaf

protected boolean m_isLeaf

True if node is leaf.

m_isEmpty

protected boolean m_isEmpty

True if node is empty.

m_train

protected Instances m_train

The training instances.

m_test

protected Distribution m_test

The pruning instances.

indeX

protected int indeX

Which son to expand?

Constructor Detail

ClassifierDecList

public ClassifierDecList(ModelSelection toSelectLocModel)

Constructor - just calls constructor of class DecList.

Method Detail

buildDecList

public void buildDecList(Instances data,
                         boolean leaf)
                  throws java.lang.Exception

Builds the partial tree without hold out set.

Throws:

java.lang.Exception - if something goes wrong

buildDecList

public void buildDecList(Instances train,
                         Instances test,
                         boolean leaf)
                  throws java.lang.Exception

Builds the partial tree with hold out set

Throws:

java.lang.Exception - if something goes wrong

classifyInstance

public double classifyInstance(Instance instance)
                        throws java.lang.Exception

Classifies an instance.

Throws:

java.lang.Exception - if something goes wrong

distributionForInstance

public final double[] distributionForInstance(Instance instance)
                                       throws java.lang.Exception

Returns class probabilities for a weighted instance.

Throws:

java.lang.Exception - if something goes wrong

weight

public double weight(Instance instance)
              throws java.lang.Exception

Returns the weight a rule assigns to an instance.

Throws:

java.lang.Exception - if something goes wrong

cleanup

public final void cleanup(Instances justHeaderInfo)

Cleanup in order to save memory.

toString

public java.lang.String toString()

Prints rules.

Overrides:

toString in class java.lang.Object

getNewDecList

protected ClassifierDecList getNewDecList(Instances train,
                                          boolean leaf)
                                   throws java.lang.Exception

Returns a newly created tree.

Throws:

java.lang.Exception - if something goes wrong

getNewDecList

protected ClassifierDecList getNewDecList(Instances train,
                                          Instances test,
                                          boolean leaf)
                                   throws java.lang.Exception

Returns a newly created tree.

Throws:

java.lang.Exception - if something goes wrong

chooseLastIndex

protected int chooseLastIndex()

Dummy method. Overwritten by sub classes.

chooseIndex

protected int chooseIndex()

Dummy method. Overwritten by sub classes.

pruneEnd

protected void pruneEnd()
                 throws java.lang.Exception

Dummy method. Overwritten by sub classes.