se.lth.cs.nlp.nlputils.ml
Class ProbabilityClassifier<T>

java.lang.Object
  se.lth.cs.nlp.nlputils.ml.Classifier<T>
      se.lth.cs.nlp.nlputils.ml.ProbabilityClassifier<T>

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

LibSVMClassifier, NativeLibSVMClassifier

public abstract class ProbabilityClassifier<T>
extends Classifier<T>

A classifier that can compute posterior class probabilities.

Author:

Richard Johansson (richard@cs.lth.se)

See Also:

Serialized Form

Field Summary

Fields inherited from class se.lth.cs.nlp.nlputils.ml.Classifier

extractor, list

Constructor Summary

ProbabilityClassifier()

Method Summary

abstract void	computeProbabilities(FeatureList features, double[] probs) Computes the posterior class probabilities given a feature list.
int	computeProbabilities(T item, double[] probs) Computes the posterior class probabilities given an item.

Methods inherited from class se.lth.cs.nlp.nlputils.ml.Classifier

classify, classify, classifyRestricted, setFeatureExtractor

Methods inherited from class java.lang.Object

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

Constructor Detail

ProbabilityClassifier

public ProbabilityClassifier()

Method Detail

computeProbabilities

public int computeProbabilities(T item,
                                double[] probs)

Computes the posterior class probabilities given an item.

Parameters:

item - the item to classify.

probs - the array of doubles where the probabilities are written.

Returns:

the feature extraction status value.

computeProbabilities

public abstract void computeProbabilities(FeatureList features,
                                          double[] probs)

Computes the posterior class probabilities given a feature list.

Parameters:

features - the feature list.

probs - the array of doubles where the probabilities are written.