edu.stanford.nlp.cluster
Class HardCluster

java.lang.Object
  |
  +--edu.stanford.nlp.cluster.SimpleCluster
        |
        +--edu.stanford.nlp.cluster.HardCluster

All Implemented Interfaces:

Cloneable, Cluster

Direct Known Subclasses:

HHCluster

public class HardCluster

extends SimpleCluster

Hard Cluster. Each datum belongs to only 1 cluster with probability 1. HardCluster stores term and document probabilities in SparseDoubleArrays. This is more space and time efficient for Hard Clusters, but SoftCluster should be used for clusters which are defined as a smooth probability distribution over terms,documents

Field Summary

Fields inherited from class edu.stanford.nlp.cluster.SimpleCluster

index, mean, nd, nt, pr_d_z, pr_w_z, pr_z, scatter

Constructor Summary

HardCluster(int num_terms, int num_docs)
Allocates memory for arrays and initializes values to 0

HardCluster(int num_terms, int num_docs, int i)
Allocates memory for arrays, sets index, and initializes values to 0

Method Summary

void	addDatum(int ind) Adds a datum to the cluster
int[]	dataIndices() Returns an array of indices of the data that are contained in this cluster

Methods inherited from class edu.stanford.nlp.cluster.SimpleCluster

clearData, clone, equals, evaluateIntraSimilarity, evaluateWeightedMean, get_pr_d_z, get_pr_d_z, get_pr_w_z, get_pr_w_z, get_pr_z, getIndex, getIntraSimilarity, getMean, set_pr_d_z, set_pr_d_z, set_pr_w_z, set_pr_w_z, set_pr_z, setIndex, toString, toString, toXMLString, toXMLString

Methods inherited from class java.lang.Object

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

Constructor Detail

HardCluster

public HardCluster(int num_terms,
                   int num_docs)

Allocates memory for arrays and initializes values to 0

HardCluster

public HardCluster(int num_terms,
                   int num_docs,
                   int i)

Allocates memory for arrays, sets index, and initializes values to 0

Method Detail

dataIndices

public int[] dataIndices()

Returns an array of indices of the data that are contained in this cluster

addDatum

public void addDatum(int ind)

Adds a datum to the cluster