com.wcohen.ss

Class TagLink

java.lang.Object

com.wcohen.ss.AbstractStringDistance

com.wcohen.ss.AbstractTokenizedStringDistance

com.wcohen.ss.AbstractStatisticalTokenDistance

com.wcohen.ss.TagLink

All Implemented Interfaces:

StringDistance, StringDistanceLearner

public class TagLink
extends AbstractStatisticalTokenDistance

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	TagLink.Candidates
protected class	TagLink.UnitVector Marker class extending BagOfTokens

Field Summary

Fields inherited from class com.wcohen.ss.AbstractStatisticalTokenDistance

collectionSize, documentFrequency, totalTokenCount

Fields inherited from class com.wcohen.ss.AbstractTokenizedStringDistance

tokenizer

Constructor Summary

Constructors

Constructor and Description
TagLink() TagLink default constructor.
TagLink(AbstractStringDistance tokenDistance) TagLink constructor requires a character based string metric.
TagLink(String[] dataSetArray) TagLink constructor requires dataset string array in order to compute the IDF weights.
TagLink(String[] dataSetArray, AbstractStringDistance tokenDistance) TagLink constructor requires dataset string array in order to compute the IDF weights and a tokenDistance metric.
TagLink(Tokenizer tokenizer, AbstractStringDistance tokenDistance) TagLink constructor requires a tokenizer and a tokenDistance metric

Method Summary

Modifier and Type	Method and Description
protected TagLink.UnitVector	asUnitVector(StringWrapper w)
String	explainScore(StringWrapper s, StringWrapper t) explainStringMetric gives a brief explanation of how the stringMetric was computed.
StringWrapper	prepare(String s) Preprocess a string by finding tokens and giving them TFIDF weights
double	score(StringWrapper s, StringWrapper t) getStringMetric computes the similarity between a pair of strings T and U.
String	toString() toString returns the name and parameters of this string metric

Methods inherited from class com.wcohen.ss.AbstractStatisticalTokenDistance

checkTrainingHasHappened, getDocumentFrequency, tokenIterator, train

Methods inherited from class com.wcohen.ss.AbstractTokenizedStringDistance

asBagOfTokens, prepare, setStringWrapperPool

Methods inherited from class com.wcohen.ss.AbstractStringDistance

addExample, doMain, explainScore, getDistance, hasNextQuery, nextQuery, prepare, score, setDistanceInstancePool

Methods inherited from class java.lang.Object

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

Constructor Detail

TagLink

public TagLink()

TagLink default constructor. IDF weights are all equally weighted. Transposition constant value is 0.3

TagLink

public TagLink(AbstractStringDistance tokenDistance)

TagLink constructor requires a character based string metric.

Parameters:

characterBasedStringMetric - CharacterBasedStringMetric

TagLink

public TagLink(Tokenizer tokenizer,
               AbstractStringDistance tokenDistance)

TagLink constructor requires a tokenizer and a tokenDistance metric

Parameters:

trainDataObjectArray - TrainDataObject[]

TagLink

public TagLink(String[] dataSetArray)

TagLink constructor requires dataset string array in order to compute the IDF weights. Default character based string metric is TagLinkToken.

Parameters:

dataSetArray - String[]

TagLink

public TagLink(String[] dataSetArray,
               AbstractStringDistance tokenDistance)

TagLink constructor requires dataset string array in order to compute the IDF weights and a tokenDistance metric.

Parameters:

dataSetArray - String[]

Method Detail

score

public double score(StringWrapper s,
                    StringWrapper t)

getStringMetric computes the similarity between a pair of strings T and U.

Specified by:

score in interface StringDistance

Specified by:

score in class AbstractStringDistance

Parameters:

T - String

U - String

Returns:

double

asUnitVector

protected TagLink.UnitVector asUnitVector(StringWrapper w)

prepare

public StringWrapper prepare(String s)

Preprocess a string by finding tokens and giving them TFIDF weights

Specified by:

prepare in interface StringDistance

Overrides:

prepare in class AbstractStringDistance

explainScore

public String explainScore(StringWrapper s,
                           StringWrapper t)

explainStringMetric gives a brief explanation of how the stringMetric was computed.

Specified by:

explainScore in interface StringDistance

Specified by:

explainScore in class AbstractStringDistance

Parameters:

S - String

T - String

Returns:

String

toString

public String toString()

toString returns the name and parameters of this string metric

Overrides:

toString in class Object

Returns:

String