idl.tmt.representation
Class GenericHardClustering

java.lang.Object
  |
  +--idl.tmt.representation.GenericHardClustering

All Implemented Interfaces:

Clustering, HardClustering

public class GenericHardClustering

extends java.lang.Object

implements HardClustering

A generic hard clustering that can be built from a soft clustering. Simply choose the cluster with the highest probability for cluster membership. Created on Apr 14, 2004

Author:

jelsas

Inner Class Summary

private class

GenericHardClustering.GenericHardCluster

Field Summary

private Cluster[]	clusters
private IndexedCollection	collection
private int[]	hardClustering
private LogOddsUtil	logOddsUtil
private TermFrequencyUtil	termFreqUtil

Constructor Summary

GenericHardClustering(SoftClustering softCl, IndexedCollection collection)

Method Summary

private void	checkLOU() Checks to make sure the logOddsUtil member has been instantiated, just to support lazyness.
private void	checkTFU() Checks to make sure the termFreqUtil member has been instantiated, just to support lazyness.
Cluster	getCluster(int clusterIndex) Returns the cluster associated with this cluster ID
int	getClusterMembership(int docID) returns the clusterID that this document belongs to
int	getNumClusters() returns the number of clusters in this clustering
int	getNumDocuments() Returns the number of documents in this clustering

Methods inherited from class java.lang.Object

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

Field Detail

hardClustering

private int[] hardClustering

clusters

private Cluster[] clusters

collection

private IndexedCollection collection

logOddsUtil

private LogOddsUtil logOddsUtil

termFreqUtil

private TermFrequencyUtil termFreqUtil

Constructor Detail

GenericHardClustering

public GenericHardClustering(SoftClustering softCl,
                             IndexedCollection collection)

Method Detail

getClusterMembership

public int getClusterMembership(int docID)

returns the clusterID that this document belongs to

Specified by:

getClusterMembership in interface HardClustering

See Also:

HardClustering.getClusterMembership(int)

getNumClusters

public int getNumClusters()

returns the number of clusters in this clustering

Specified by:

getNumClusters in interface Clustering

See Also:

Clustering.getNumClusters()

getCluster

public Cluster getCluster(int clusterIndex)

Returns the cluster associated with this cluster ID

Specified by:

getCluster in interface Clustering

See Also:

Clustering.getCluster(int)

getNumDocuments

public int getNumDocuments()

Returns the number of documents in this clustering

Specified by:

getNumDocuments in interface Clustering

See Also:

Clustering.getNumDocuments()

checkLOU

private void checkLOU()

Checks to make sure the logOddsUtil member has been instantiated, just to support lazyness.

checkTFU

private void checkTFU()

Checks to make sure the termFreqUtil member has been instantiated, just to support lazyness.