edu.stanford.nlp.tagger.maxent
Class TaggerFeature

java.lang.Object
  |
  +--edu.stanford.nlp.maxent.iis.Feature
        |
        +--edu.stanford.nlp.tagger.maxent.TaggerFeature

public class TaggerFeature

extends Feature

Holds a Tagger Feature for the loglinear model. Tagger Features are binary valued, and indexed in a particular way.

Field Summary

Fields inherited from class edu.stanford.nlp.maxent.iis.Feature

hashValues, indexedValues, sum, valuesI

Constructor Summary

TaggerFeature()

TaggerFeature(int start, int end, FeatureKey key)

Method Summary

double	ftiled()
double	getVal(int index) Get the value at the index-ed non zero value pair (x,y)
double	getVal(int x, int y) This is rarely used because it is slower and requires initHashVals() to be called beforehand to initiallize the hashValues
int	getX(int index)
int	getY(int index)
int	getYTag()
int	len()
void	read(InDataStreamFile rF)
void	save(OutDataStreamFile rF)

Methods inherited from class edu.stanford.nlp.maxent.iis.Feature

initHashVals, isEmpty, print, print, setSum, sumValues

Methods inherited from class java.lang.Object

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

Constructor Detail

TaggerFeature

public TaggerFeature(int start,
                     int end,
                     FeatureKey key)

TaggerFeature

public TaggerFeature()

Method Detail

getVal

public double getVal(int index)

Description copied from class: Feature

Get the value at the index-ed non zero value pair (x,y)

Overrides:

getVal in class Feature

getY

public int getY(int index)

Overrides:

getY in class Feature

Returns:

the outcome y of the index-th (x,y) pair

len

public int len()

Overrides:

len in class Feature

getX

public int getX(int index)

Overrides:

getX in class Feature

Returns:

the history x of the index-th (x,y) pair

getYTag

public int getYTag()

getVal

public double getVal(int x,
                     int y)

Description copied from class: Feature

This is rarely used because it is slower and requires initHashVals() to be called beforehand to initiallize the hashValues

Overrides:

getVal in class Feature

save

public void save(OutDataStreamFile rF)

Overrides:

save in class Feature

read

public void read(InDataStreamFile rF)

Overrides:

read in class Feature

ftiled

public double ftiled()

Overrides:

ftiled in class Feature

Returns:

the emptirical expectation of the feature