dragon.ml.seqmodel.crf

Class AbstractCRF

java.lang.Object

dragon.ml.seqmodel.crf.AbstractCRF

Direct Known Subclasses:

AbstractTrainer, ViterbiBasicLabeler, ViterbiSegmentLabeler

public abstract class AbstractCRF
extends Object

Abstract class for conditional random field

Copyright: Copyright (c) 2005

Company: IST, Drexel University

Version:

1.0

Author:

Davis Zhou

Field Summary

Fields

Modifier and Type	Field and Description
protected EdgeGenerator	edgeGen
protected FeatureGenerator	featureGenerator
protected double[]	lambda
protected ModelGraph	model

Constructor Summary

Constructors

Constructor and Description
AbstractCRF(ModelGraph model, FeatureGenerator featureGen)

Method Summary

Modifier and Type	Method and Description
protected void	computeTransMatrix(double[] lambda, DataSequence data, int startPos, int endPos, DoubleDenseMatrix transMatrix, boolean takeExp)
protected void	computeTransMatrix(double[] lambda, DoubleDenseMatrix transMatrix, boolean takeExp)
FeatureGenerator	getFeatureGenerator()
ModelGraph	getModelGraph()
double[]	getModelParameter()
boolean	readModelParameter(String filename)
boolean	saveModelParameter(String filename)

Methods inherited from class java.lang.Object

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

Field Detail

edgeGen

protected EdgeGenerator edgeGen

featureGenerator

protected FeatureGenerator featureGenerator

model

protected ModelGraph model

lambda

protected double[] lambda

Constructor Detail

AbstractCRF

public AbstractCRF(ModelGraph model,
                   FeatureGenerator featureGen)

Method Detail

getFeatureGenerator

public FeatureGenerator getFeatureGenerator()

getModelGraph

public ModelGraph getModelGraph()

getModelParameter

public double[] getModelParameter()

saveModelParameter

public boolean saveModelParameter(String filename)

readModelParameter

public boolean readModelParameter(String filename)

computeTransMatrix

protected void computeTransMatrix(double[] lambda,
                                  DataSequence data,
                                  int startPos,
                                  int endPos,
                                  DoubleDenseMatrix transMatrix,
                                  boolean takeExp)

computeTransMatrix

protected void computeTransMatrix(double[] lambda,
                                  DoubleDenseMatrix transMatrix,
                                  boolean takeExp)