eu.project.ttc.models

Class ContextVector

java.lang.Object

eu.project.ttc.models.ContextVector

public class ContextVector
extends java.lang.Object

A sorted Term/Frequency map used as a context vector during alignment operations.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	ContextVector.Entry

Constructor Summary

Constructors

Constructor and Description
ContextVector() Default constructor for ContextVector.
ContextVector(Term term) Construct a context vector with a back reference to its owner term.
ContextVector(Term term, boolean useTermClasses) Construct a context vector with a back reference to its owner term.

Method Summary

Modifier and Type	Method and Description
void	addAllCooccurrences(java.util.Iterator<TermOccurrence> it)
void	addCooccurrence(TermOccurrence occ)
void	addEntry(Term coTerm, int nbCooccs, double assocRate)
boolean	equals(java.lang.Object obj)
double	getAssocRate(Term term)
java.util.List<ContextVector.Entry>	getEntries() Gives the list of terms in this context vector sorted by frequency (most frequent first)
int	getNbCooccs(Term term)
Term	getTerm()
int	getTotalCoccurrences()
int	hashCode()
void	normalize() Normalizes all assocRates so that their sum is 1
void	removeCoTerm(Term term)
java.util.Set<Term>	terms()
void	toAssocRateVector(CrossTable table, AssociationRate assocRateFunction, boolean normalize) Normalize this vector according to a cross table and an association rate measure.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

ContextVector

public ContextVector()

Default constructor for ContextVector. Must be used if no normalization is required.

ContextVector

public ContextVector(Term term,
                     boolean useTermClasses)

Construct a context vector with a back reference to its owner term. The parent term is useful for normalization.

Parameters:

term - the owner term

useTermClasses - if true, builds this context vector with term classes instead of terms

See Also:

toAssocRateVector(CrossTable, AssociationRate, boolean)

ContextVector

public ContextVector(Term term)

Construct a context vector with a back reference to its owner term. The parent term is useful for normalization.

Parameters:

term - the owner term

See Also:

toAssocRateVector(CrossTable, AssociationRate, boolean)

Method Detail

addAllCooccurrences

public void addAllCooccurrences(java.util.Iterator<TermOccurrence> it)

addCooccurrence

public void addCooccurrence(TermOccurrence occ)

addEntry

public void addEntry(Term coTerm,
                     int nbCooccs,
                     double assocRate)

removeCoTerm

public void removeCoTerm(Term term)

getEntries

public java.util.List<ContextVector.Entry> getEntries()

Gives the list of terms in this context vector sorted by frequency (most frequent first)

Returns:

normalize

public void normalize()

Normalizes all assocRates so that their sum is 1

getNbCooccs

public int getNbCooccs(Term term)

getAssocRate

public double getAssocRate(Term term)

terms

public java.util.Set<Term> terms()

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

getTerm

public Term getTerm()

toAssocRateVector

public void toAssocRateVector(CrossTable table,
                              AssociationRate assocRateFunction,
                              boolean normalize)

Normalize this vector according to a cross table and an association rate measure. This method recomputes all ContextVector.Entry.frequency values with the normalized ones.

Parameters:

table - the pre-computed co-occurrences CrossTable

assocRateFunction - the AssociationRate measure implementation

normalize -

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getTotalCoccurrences

public int getTotalCoccurrences()