de.l3s.icrawl.contentanalysis

Class DocumentVector

java.lang.Object

de.l3s.icrawl.contentanalysis.DocumentVector

All Implemented Interfaces:

Serializable

public class DocumentVector
extends Object
implements Serializable

A sparse representation of a term frequency document vector

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
DocumentVector(Collection<String> tokens)
DocumentVector(Map<String,Double> elements)

Method Summary

Modifier and Type	Method and Description
double	cosineSimilarity(DocumentVector other)
double	dotProduct(DocumentVector other)
boolean	equals(Object obj)
int	hashCode()
static DocumentVector	merge(Collection<DocumentVector> vectors, boolean useDocumentFrequency)
List<Map.Entry<String,Double>>	topComponents(int count)
DocumentVector	topN(int n)
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

DocumentVector

public DocumentVector(Map<String,Double> elements)

DocumentVector

public DocumentVector(Collection<String> tokens)

Method Detail

cosineSimilarity

public double cosineSimilarity(DocumentVector other)

dotProduct

public double dotProduct(DocumentVector other)

merge

public static DocumentVector merge(Collection<DocumentVector> vectors,
                                   boolean useDocumentFrequency)

topN

public DocumentVector topN(int n)

topComponents

public List<Map.Entry<String,Double>> topComponents(int count)

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object