edu.northwestern.at.morphadorner.corpuslinguistics.postagger.smoothing.contextual

Interface ContextualSmoother

All Known Implementing Classes:

AbstractContextualSmoother, AdditiveContextualSmoother, DefaultContextualSmoother, DeletedInterpolationContextualSmoother

public interface ContextualSmoother

Interface for a contextual smoother.

A contextual smoother computes the contextually smoothed probabability of a word given a part of speech tag, e.g., p( word | tag ).

Method Summary

Methods

Modifier and Type	Method and Description
int	cachedProbabilitiesCount() Get the number of cached contextual probabilities.
void	clearCachedProbabilities() Clear cached probabilities..
Probability	contextualProbability(java.lang.String tag, java.lang.String previousTag) Compute smoothed contextual probability of a tag given the previous tag.
Probability	contextualProbability(java.lang.String tag, java.lang.String previousTag, java.lang.String previousPreviousTag) Compute smoothed contextual probability of a tag given the previous tags.
void	setPartOfSpeechTagger(PartOfSpeechTagger posTagger) Set the part of speech tagger for this smoother.

Method Detail

setPartOfSpeechTagger

void setPartOfSpeechTagger(PartOfSpeechTagger posTagger)

Set the part of speech tagger for this smoother.

Parameters:

posTagger - Part of speech tagger for which this smoother provides probabilities.

cachedProbabilitiesCount

int cachedProbabilitiesCount()

Get the number of cached contextual probabilities.

Returns:

The number of cached contextual probabilities.

clearCachedProbabilities

void clearCachedProbabilities()

Clear cached probabilities..

contextualProbability

Probability contextualProbability(java.lang.String tag,
                                java.lang.String previousTag)

Compute smoothed contextual probability of a tag given the previous tag.

Parameters:

tag - The current tag.

previousTag - The previous tag.

Returns:

The probability of the current tag given the previous tag, e.g, p( tag | previousTag ).

contextualProbability

Probability contextualProbability(java.lang.String tag,
                                java.lang.String previousTag,
                                java.lang.String previousPreviousTag)

Compute smoothed contextual probability of a tag given the previous tags.

Parameters:

tag - The current tag.

previousTag - The previous tag.

previousPreviousTag - The previous tag of the previous tag.

Returns:

The probability of the current tag given the previous two tags, e.g, p( tag | prevTag , prevPrevTag ).