dragon.ml.seqmodel.crf

Class ViterbiSegmentLabeler

java.lang.Object

dragon.ml.seqmodel.crf.AbstractCRF

dragon.ml.seqmodel.crf.ViterbiSegmentLabeler

All Implemented Interfaces:

Labeler

public class ViterbiSegmentLabeler
extends AbstractCRF
implements Labeler

Viterb segment labeler

Copyright: Copyright (c) 2005

Company: IST, Drexel University

Version:

1.0

Author:

Davis Zhou

Field Summary

Fields inherited from class dragon.ml.seqmodel.crf.AbstractCRF

edgeGen, featureGenerator, lambda, model

Constructor Summary

Constructors

Constructor and Description
ViterbiSegmentLabeler(ModelGraph model, FeatureGenerator featureGenerator, int maxSegmentLength)

Method Summary

Modifier and Type	Method and Description
double	getBestSolution(DataSequence dataSeq, int order) Gets the order-th solution.
boolean	label(DataSequence dataSeq) Labels the given sequence
boolean	label(DataSequence dataSeq, double[] lambda) Labels the sequence using the given model

Methods inherited from class dragon.ml.seqmodel.crf.AbstractCRF

computeTransMatrix, computeTransMatrix, getFeatureGenerator, getModelGraph, getModelParameter, readModelParameter, saveModelParameter

Methods inherited from class java.lang.Object

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

Methods inherited from interface dragon.ml.seqmodel.crf.Labeler

getFeatureGenerator, getModelGraph, getModelParameter, readModelParameter

Constructor Detail

ViterbiSegmentLabeler

public ViterbiSegmentLabeler(ModelGraph model,
                             FeatureGenerator featureGenerator,
                             int maxSegmentLength)

Method Detail

label

public boolean label(DataSequence dataSeq)

Description copied from interface: Labeler

Labels the given sequence

Specified by:

label in interface Labeler

Parameters:

dataSeq - the sequence for labeling

Returns:

true if labeled successfully

label

public boolean label(DataSequence dataSeq,
                     double[] lambda)

Description copied from interface: Labeler

Labels the sequence using the given model

Specified by:

label in interface Labeler

Parameters:

dataSeq - the sequence for labeling

lambda - the parameters of the CRF model

Returns:

true if labeled successfully

getBestSolution

public double getBestSolution(DataSequence dataSeq,
                              int order)

Description copied from interface: Labeler

Gets the order-th solution. The labels will be set to the data sequence. To get the best solution, the order should be set to zero

Specified by:

getBestSolution in interface Labeler

Parameters:

dataSeq - the data seqeunce

order - the ranking of the solutions

Returns:

the score of the solution