weka.classifiers.trees.j48
Class NoSplit

java.lang.Object
  |
  +--weka.classifiers.trees.j48.ClassifierSplitModel
        |
        +--weka.classifiers.trees.j48.NoSplit

All Implemented Interfaces:

java.lang.Cloneable, java.io.Serializable

public final class NoSplit

extends ClassifierSplitModel

Class implementing a "no-split"-split.

Version:

$Revision: 1.6 $

Author:

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

See Also:

Serialized Form

Constructor Summary

NoSplit(Distribution distribution)
Creates "no-split"-split for given distribution.

Method Summary

void	buildClassifier(Instances instances) Creates a "no-split"-split for a given set of instances.
java.lang.String	leftSide(Instances instances) Does nothing because no condition has to be satisfied.
java.lang.String	rightSide(int index, Instances instances) Does nothing because no condition has to be satisfied.
java.lang.String	sourceExpression(int index, Instances data) Returns a string containing java source code equivalent to the test made at this node.
double[]	weights(Instance instance) Always returns null because there is only one subset.
int	whichSubset(Instance instance) Always returns 0 because only there is only one subset.

Methods inherited from class weka.classifiers.trees.j48.ClassifierSplitModel

checkModel, classifyInstance, classProb, classProbLaplace, clone, codingCost, distribution, dumpLabel, dumpModel, numSubsets, resetDistribution, sourceClass, split

Methods inherited from class java.lang.Object

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

Constructor Detail

NoSplit

public NoSplit(Distribution distribution)

Creates "no-split"-split for given distribution.

Method Detail

buildClassifier

public final void buildClassifier(Instances instances)
                           throws java.lang.Exception

Creates a "no-split"-split for a given set of instances.

Specified by:

buildClassifier in class ClassifierSplitModel

Throws:

java.lang.Exception - if split can't be built successfully

whichSubset

public final int whichSubset(Instance instance)

Always returns 0 because only there is only one subset.

Specified by:

whichSubset in class ClassifierSplitModel

weights

public final double[] weights(Instance instance)

Always returns null because there is only one subset.

Specified by:

weights in class ClassifierSplitModel

leftSide

public final java.lang.String leftSide(Instances instances)

Does nothing because no condition has to be satisfied.

Specified by:

leftSide in class ClassifierSplitModel

Parameters:

instances - the data.

rightSide

public final java.lang.String rightSide(int index,
                                        Instances instances)

Does nothing because no condition has to be satisfied.

Specified by:

rightSide in class ClassifierSplitModel

sourceExpression

public final java.lang.String sourceExpression(int index,
                                               Instances data)

Returns a string containing java source code equivalent to the test made at this node. The instance being tested is called "i".

Specified by:

sourceExpression in class ClassifierSplitModel

Parameters:

index - index of the nominal value tested

data - the data containing instance structure info

Returns:

a value of type 'String'