org.apache.ctakes.assertion.attributes.features.selection

Class MutualInformationFeatureSelection<OUTCOME_T>

java.lang.Object

org.apache.ctakes.assertion.attributes.features.selection.FeatureSelection<OUTCOME_T>

org.apache.ctakes.assertion.attributes.features.selection.MutualInformationFeatureSelection<OUTCOME_T>

public class MutualInformationFeatureSelection<OUTCOME_T>
extends FeatureSelection<OUTCOME_T>

Copyright (c) 2007-2012, Regents of the University of Colorado
All rights reserved.

Selects features via mutual information statistics between the features extracted from its sub-extractor and the outcome values they are paired with in classification instances.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	MutualInformationFeatureSelection.CombineScoreMethod Specifies how scores for each outcome should be combined/aggregated into a single score
static class	MutualInformationFeatureSelection.MutualInformationStats<OUTCOME_T> Helper class for aggregating and computing mutual information statistics

Field Summary

Fields

Modifier and Type	Field and Description
private MutualInformationFeatureSelection.CombineScoreMethod	combineScoreMethod
private MutualInformationFeatureSelection.MutualInformationStats<OUTCOME_T>	mutualInfoStats
private int	numFeatures
private double	smoothingCount

Fields inherited from class org.apache.ctakes.assertion.attributes.features.selection.FeatureSelection

isTrained, selectedFeatureNames

Constructor Summary

Constructors

Constructor and Description
MutualInformationFeatureSelection(java.lang.String name)
MutualInformationFeatureSelection(java.lang.String name, int numFeatures)
MutualInformationFeatureSelection(java.lang.String name, MutualInformationFeatureSelection.CombineScoreMethod combineScoreMethod, double smoothingCount, int numFeatures)

Method Summary

Methods

Modifier and Type	Method and Description
void	load(java.net.URI uri)
void	save(java.net.URI uri)
void	train(java.lang.Iterable<> instances)

Methods inherited from class org.apache.ctakes.assertion.attributes.features.selection.FeatureSelection

apply, getFeatureName, transform, transform

Methods inherited from class java.lang.Object

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

Field Detail

mutualInfoStats

private MutualInformationFeatureSelection.MutualInformationStats<OUTCOME_T> mutualInfoStats

numFeatures

private int numFeatures

combineScoreMethod

private MutualInformationFeatureSelection.CombineScoreMethod combineScoreMethod

smoothingCount

private double smoothingCount

Constructor Detail

MutualInformationFeatureSelection

public MutualInformationFeatureSelection(java.lang.String name)

MutualInformationFeatureSelection

public MutualInformationFeatureSelection(java.lang.String name,
                                 int numFeatures)

MutualInformationFeatureSelection

public MutualInformationFeatureSelection(java.lang.String name,
                                 MutualInformationFeatureSelection.CombineScoreMethod combineScoreMethod,
                                 double smoothingCount,
                                 int numFeatures)

Method Detail

train

public void train(java.lang.Iterable<> instances)

save

public void save(java.net.URI uri)
          throws java.io.IOException

Throws:

java.io.IOException

load

public void load(java.net.URI uri)
          throws java.io.IOException

Throws:

java.io.IOException