edu.cmu.minorthird.classify.transform
Class InfoGainInstanceTransform

java.lang.Object
  edu.cmu.minorthird.classify.transform.InfoGainInstanceTransform

All Implemented Interfaces:

InstanceTransform

public class InfoGainInstanceTransform
extends java.lang.Object
implements InstanceTransform

Author:

Edoardo M. Airoldi Date: Feb 6, 2004

Constructor Summary

InfoGainInstanceTransform()
Constructor

Method Summary

void	addFeatureIG(double infoGain, Feature f) Adds the Info-Gain score of feature f to the InstanceTransform
void	setNumberOfFeatures(int number) Number of features with the highest Info-Gain scores to keep in the dataset
java.lang.String	toString(int top) get top ranked features
Dataset	transform(Dataset dataset) Transform a dataset according to Info-Gain criterion
Example	transform(Example example) Not used
Instance	transform(Instance instance) Not used

Methods inherited from class java.lang.Object

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

Constructor Detail

InfoGainInstanceTransform

public InfoGainInstanceTransform()

Constructor

Method Detail

transform

public Instance transform(Instance instance)

Not used

Specified by:

transform in interface InstanceTransform

transform

public Example transform(Example example)

Not used

Specified by:

transform in interface InstanceTransform

transform

public Dataset transform(Dataset dataset)

Transform a dataset according to Info-Gain criterion

Specified by:

transform in interface InstanceTransform

setNumberOfFeatures

public void setNumberOfFeatures(int number)

Number of features with the highest Info-Gain scores to keep in the dataset

addFeatureIG

public void addFeatureIG(double infoGain,
                         Feature f)

Adds the Info-Gain score of feature f to the InstanceTransform

toString

public java.lang.String toString(int top)

get top ranked features