meka.classifiers.multilabel.meta

Class EM

java.lang.Object

weka.classifiers.AbstractClassifier

weka.classifiers.SingleClassifierEnhancer

meka.classifiers.multilabel.MultilabelClassifier

meka.classifiers.multilabel.meta.EM

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, SemisupervisedClassifier, weka.classifiers.Classifier, weka.core.CapabilitiesHandler, weka.core.OptionHandler, weka.core.RevisionHandler, weka.core.TechnicalInformationHandler

Direct Known Subclasses:

CM

public class EM
extends MultilabelClassifier
implements SemisupervisedClassifier, weka.core.TechnicalInformationHandler

EM.java - Expectation Maximization using any multi-label classifier. A specified multi-label classifier is built on the training data. This model is then used to classify the test data. The confidence with which instances are classified is used to reweight them. This data is then used to retrain the classifier. This cycle continues ('EM'-style) for I iterations. The final model is used to officially classifier the test data.
Because of the weighting, it is advised to use a classifier which gives good confidence (probabalistic) outputs.

Version:

2010

Author:

Jesse Read

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
EM()

Method Summary

Methods

Modifier and Type	Method and Description
void	buildClassifier(weka.core.Instances D)
double[]	distributionForInstance(weka.core.Instance x)
int	getIterations()
java.lang.String[]	getOptions()
java.lang.String	getRevision()
weka.core.TechnicalInformation	getTechnicalInformation()
java.lang.String	globalInfo() Description to display in the GUI.
java.util.Enumeration	listOptions()
static void	main(java.lang.String[] args)
void	setIterations(int i)
void	setOptions(java.lang.String[] options)
void	setUnlabelledData(weka.core.Instances D) Set Unlabelled Data - provide unlabelled data prior to calling buildClassifier(Instances).

Methods inherited from class meka.classifiers.multilabel.MultilabelClassifier

evaluation, getCapabilities, getTemplate, makeCopies, runClassifier, testCapabilities, toString

Methods inherited from class weka.classifiers.SingleClassifierEnhancer

classifierTipText, getClassifier, setClassifier

Methods inherited from class weka.classifiers.AbstractClassifier

classifyInstance, debugTipText, forName, getDebug, makeCopies, makeCopy, runClassifier, setDebug

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

EM

public EM()

Method Detail

setUnlabelledData

public void setUnlabelledData(weka.core.Instances D)

Description copied from interface: SemisupervisedClassifier

Set Unlabelled Data - provide unlabelled data prior to calling buildClassifier(Instances).

Specified by:

setUnlabelledData in interface SemisupervisedClassifier

Parameters:

D - Instances for which the true class labels are not available for each instance.

globalInfo

public java.lang.String globalInfo()

Description copied from class: MultilabelClassifier

Description to display in the GUI.

Overrides:

globalInfo in class MultilabelClassifier

Returns:

the description

buildClassifier

public void buildClassifier(weka.core.Instances D)
                     throws java.lang.Exception

Specified by:

buildClassifier in interface weka.classifiers.Classifier

Specified by:

buildClassifier in class MultilabelClassifier

Throws:

java.lang.Exception

distributionForInstance

public double[] distributionForInstance(weka.core.Instance x)
                                 throws java.lang.Exception

Specified by:

distributionForInstance in interface weka.classifiers.Classifier

Specified by:

distributionForInstance in class MultilabelClassifier

Throws:

java.lang.Exception

setIterations

public void setIterations(int i)

getIterations

public int getIterations()

listOptions

public java.util.Enumeration listOptions()

Specified by:

listOptions in interface weka.core.OptionHandler

Overrides:

listOptions in class weka.classifiers.SingleClassifierEnhancer

setOptions

public void setOptions(java.lang.String[] options)
                throws java.lang.Exception

Specified by:

setOptions in interface weka.core.OptionHandler

Overrides:

setOptions in class weka.classifiers.SingleClassifierEnhancer

Throws:

java.lang.Exception

getOptions

public java.lang.String[] getOptions()

Specified by:

getOptions in interface weka.core.OptionHandler

Overrides:

getOptions in class weka.classifiers.SingleClassifierEnhancer

getRevision

public java.lang.String getRevision()

Specified by:

getRevision in interface weka.core.RevisionHandler

Overrides:

getRevision in class MultilabelClassifier

getTechnicalInformation

public weka.core.TechnicalInformation getTechnicalInformation()

Specified by:

getTechnicalInformation in interface weka.core.TechnicalInformationHandler

main

public static void main(java.lang.String[] args)