edu.stanford.nlp.classify
Class AbstractClassifier

java.lang.Object
  |
  +--edu.stanford.nlp.classify.AbstractClassifier

All Implemented Interfaces:

Classifier

Direct Known Subclasses:

KNN, NaiveBayesClassifier

public abstract class AbstractClassifier

extends Object

implements Classifier

Field Summary

protected Matrix	testmatrix
protected Matrix	trainlabels
protected Matrix	trainmatrix

Constructor Summary

AbstractClassifier()

Method Summary

protected abstract int	assignCategory(int datum) Assigns Datum datum to a category.
protected abstract Array	assignMultipleCategories(int datum) Assigns Datum datum to multiple categories with certain probabilities.
Array	classify(LabeledDataCollection train, DataCollection test) Assigns each Datum in the test collection to one single category.
protected void	initialize(LabeledDataCollection train, DataCollection test)
Matrix	softClassify(LabeledDataCollection train, DataCollection test) Assigns each Datum in the test collection to multiple categories with certain probabilities.

Methods inherited from class java.lang.Object

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

Field Detail

trainmatrix

protected Matrix trainmatrix

testmatrix

protected Matrix testmatrix

trainlabels

protected Matrix trainlabels

Constructor Detail

AbstractClassifier

public AbstractClassifier()

Method Detail

assignCategory

protected abstract int assignCategory(int datum)

Assigns Datum datum to a category. Returns index of assigned category.

assignMultipleCategories

protected abstract Array assignMultipleCategories(int datum)

Assigns Datum datum to multiple categories with certain probabilities. returns array of category_index-probability pairs.

initialize

protected void initialize(LabeledDataCollection train,
                          DataCollection test)

softClassify

public Matrix softClassify(LabeledDataCollection train,
                           DataCollection test)

Description copied from interface: Classifier

Assigns each Datum in the test collection to multiple categories with certain probabilities. Returns a Matrix whose columns are the category assignment distributions for each Datum.

Specified by:

softClassify in interface Classifier

classify

public Array classify(LabeledDataCollection train,
                      DataCollection test)

Description copied from interface: Classifier

Assigns each Datum in the test collection to one single category. Returns an Array that gives datum_index-catogory_index pairs.

Specified by:

classify in interface Classifier