dragon.ir.clustering.featurefilter

Class DocFrequencyFilter

java.lang.Object

dragon.ir.clustering.featurefilter.AbstractFeatureFilter

dragon.ir.clustering.featurefilter.DocFrequencyFilter

All Implemented Interfaces:

FeatureFilter

public class DocFrequencyFilter
extends AbstractFeatureFilter

Unsupervised Feature Selector which exclude features with its document frequency less than a given threshold

Copyright: Copyright (c) 2005

Company: IST, Drexel University

Version:

1.0

Author:

Davis Zhou

Field Summary

Fields inherited from class dragon.ir.clustering.featurefilter.AbstractFeatureFilter

featureMap, selectedFeatureNum

Constructor Summary

Constructors

Constructor and Description
DocFrequencyFilter(int minDocFrequency)

Method Summary

Modifier and Type	Method and Description
protected int[]	getSelectedFeatures(IndexReader indexReader, IRDoc[] docSet)

Methods inherited from class dragon.ir.clustering.featurefilter.AbstractFeatureFilter

getSelectedFeatureNum, initialize, isSelected, map, setSelectedFeatures

Methods inherited from class java.lang.Object

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

Constructor Detail

DocFrequencyFilter

public DocFrequencyFilter(int minDocFrequency)

Method Detail

getSelectedFeatures

protected int[] getSelectedFeatures(IndexReader indexReader,
                                    IRDoc[] docSet)

Specified by:

getSelectedFeatures in class AbstractFeatureFilter