edu.cmu.minorthird.classify
Class MostFrequentFirstLearner

java.lang.Object
  edu.cmu.minorthird.classify.OneVsAllLearner
      edu.cmu.minorthird.classify.MostFrequentFirstLearner

All Implemented Interfaces:

ClassifierLearner, java.lang.Cloneable

Direct Known Subclasses:

Recommended.MostFrequentFirstLearner

public class MostFrequentFirstLearner
extends OneVsAllLearner

Multi-class version of a binary classifier. Puts classifiers in order of ones with the most positive examples first.

Author:

Cameron Williams

Nested Class Summary

Nested classes/interfaces inherited from class edu.cmu.minorthird.classify.OneVsAllLearner

OneVsAllLearner.IllegalArgumentException

Field Summary

java.lang.String[]

sortedClassNames

Fields inherited from class edu.cmu.minorthird.classify.OneVsAllLearner

innerLearner, learner, learnerFactory, learnerName, schema

Constructor Summary

MostFrequentFirstLearner()

MostFrequentFirstLearner(BatchClassifierLearner learner)

MostFrequentFirstLearner(ClassifierLearnerFactory learnerFactory)
Deprecated. use MostFrequentFirstLearner(BatchClassifierLearner learner)

MostFrequentFirstLearner(java.lang.String l)

Method Summary

void	completeTraining() Accept a signal that no more training data is available.
Classifier	getClassifier() Return the learned classifier.

Methods inherited from class edu.cmu.minorthird.classify.OneVsAllLearner

addExample, copy, getInnerLearner, getSchema, hasNextQuery, nextQuery, reset, setInnerLearner, setInstancePool, setSchema

Methods inherited from class java.lang.Object

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

Field Detail

sortedClassNames

public java.lang.String[] sortedClassNames

Constructor Detail

MostFrequentFirstLearner

public MostFrequentFirstLearner()

MostFrequentFirstLearner

public MostFrequentFirstLearner(ClassifierLearnerFactory learnerFactory)

Deprecated. use MostFrequentFirstLearner(BatchClassifierLearner learner)

Parameters:

learnerFactory - a ClassifierLearnerFactory which should produce a BinaryClassifier with each call.

MostFrequentFirstLearner

public MostFrequentFirstLearner(java.lang.String l)

MostFrequentFirstLearner

public MostFrequentFirstLearner(BatchClassifierLearner learner)

Method Detail

completeTraining

public void completeTraining()

Description copied from interface: ClassifierLearner

Accept a signal that no more training data is available. This would trigger any additional computation that might be useful to speed up or improve the results of getClassifier().

Specified by:

completeTraining in interface ClassifierLearner

Overrides:

completeTraining in class OneVsAllLearner

getClassifier

public Classifier getClassifier()

Description copied from interface: ClassifierLearner

Return the learned classifier. The classifier should take advantage of all information sent by the teacher to date. Teachers can assume that multiple calls to getClassifier() without intervening calls to addExample() will return the same object, and do little computation. Teachers can not assume that this object is immutable: for instance, in the case of an on-line learning method, the classifier that is returned might change after more examples are learned.

All learners must implement this method.

Specified by:

getClassifier in interface ClassifierLearner

Overrides:

getClassifier in class OneVsAllLearner