net.seninp.jmotif.cluster

Class TextKMeans

java.lang.Object

net.seninp.jmotif.cluster.TextKMeans

public class TextKMeans
extends Object

Constructor Summary

Constructors

Constructor and Description
TextKMeans()

Method Summary

Modifier and Type	Method and Description
static HashMap<String,List<String>>	cluster(HashMap<String,HashMap<String,Double>> tfidf, Integer clustersNum, StartStrategy strategy) This clusters a map data structure of pairs bagName wordBag which is used as tfidf throughout of JMotif.
static HashMap<String,Double>	computeCentroid(HashMap<String,HashMap<String,Double>> tfidf, List<String> members) This computes centroid for a set of vectors.

Methods inherited from class java.lang.Object

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

Constructor Detail

TextKMeans

public TextKMeans()

Method Detail

cluster

public static HashMap<String,List<String>> cluster(HashMap<String,HashMap<String,Double>> tfidf,
                                                   Integer clustersNum,
                                                   StartStrategy strategy)

This clusters a map data structure of pairs bagName wordBag which is used as tfidf throughout of JMotif.

Parameters:

tfidf - the data to cluster.

clustersNum - desired clusters number.

strategy - The clustering strategy.

Returns:

clusters.

computeCentroid

public static HashMap<String,Double> computeCentroid(HashMap<String,HashMap<String,Double>> tfidf,
                                                     List<String> members)

This computes centroid for a set of vectors.

Parameters:

tfidf - the tfidf vectors.

members - centroid members to select from all vectors.

Returns:

the centroid.