dragon.ir.classification

Class SemanticNBClassifier

java.lang.Object

dragon.ir.classification.AbstractClassifier

dragon.ir.classification.NBClassifier

dragon.ir.classification.SemanticNBClassifier

All Implemented Interfaces:

Classifier

public class SemanticNBClassifier
extends NBClassifier

Naive Bayesian Classifier with Semantic Smoothing or Background Smoothing

Copyright: Copyright (c) 2005

Company: IST, Drexel University

Version:

1.0

Author:

Davis Zhou

Field Summary

Fields inherited from class dragon.ir.classification.NBClassifier

classPrior, lastClassProb, model

Fields inherited from class dragon.ir.classification.AbstractClassifier

arrLabel, classNum, doctermMatrix, featureSelector, indexReader, validatingDocSet

Constructor Summary

Constructors

Constructor and Description
SemanticNBClassifier(IndexReader indexReader, double bkgCoefficient)
SemanticNBClassifier(IndexReader indexReader, IndexReader topicIndexReader, DoubleSparseMatrix topicTransMatrix, double transCoefficient, double bkgCoefficient)
SemanticNBClassifier(IndexReader indexReader, IndexReader topicIndexReader, KnowledgeBase kngBase, double transCoefficient, double bkgCoefficient)
SemanticNBClassifier(String modelFile)

Method Summary

Modifier and Type	Method and Description
double	getBackgroundCoefficient()
double	getTranslationCoefficient()
void	setBackgroundCoefficient(double bkgCoefficient)
void	setTranslationCoefficient(double transCoefficient)
void	train(DocClassSet trainingDocSet) This method trains the classifier with the training document set.

Methods inherited from class dragon.ir.classification.NBClassifier

classify, classify, getClassPrior, rank, saveModel

Methods inherited from class dragon.ir.classification.AbstractClassifier

classify, classify, classify, getClassLabel, getDocTermMatrix, getFeatureSelector, getIndexReader, getRow, setFeatureSelector, train, trainFeatureSelector

Methods inherited from class java.lang.Object

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

Constructor Detail

SemanticNBClassifier

public SemanticNBClassifier(String modelFile)

SemanticNBClassifier

public SemanticNBClassifier(IndexReader indexReader,
                            double bkgCoefficient)

SemanticNBClassifier

public SemanticNBClassifier(IndexReader indexReader,
                            IndexReader topicIndexReader,
                            DoubleSparseMatrix topicTransMatrix,
                            double transCoefficient,
                            double bkgCoefficient)

SemanticNBClassifier

public SemanticNBClassifier(IndexReader indexReader,
                            IndexReader topicIndexReader,
                            KnowledgeBase kngBase,
                            double transCoefficient,
                            double bkgCoefficient)

Method Detail

getTranslationCoefficient

public double getTranslationCoefficient()

setTranslationCoefficient

public void setTranslationCoefficient(double transCoefficient)

getBackgroundCoefficient

public double getBackgroundCoefficient()

setBackgroundCoefficient

public void setBackgroundCoefficient(double bkgCoefficient)

train

public void train(DocClassSet trainingDocSet)

Description copied from interface: Classifier

This method trains the classifier with the training document set.

Specified by:

train in interface Classifier

Overrides:

train in class NBClassifier

Parameters:

trainingDocSet - training document set