moa.evaluation

Class WindowClassificationPerformanceEvaluator

java.lang.Object

moa.AbstractMOAObject

moa.options.AbstractOptionHandler

moa.evaluation.WindowClassificationPerformanceEvaluator

All Implemented Interfaces:

Serializable, ClassificationPerformanceEvaluator, MOAObject, OptionHandler

Direct Known Subclasses:

MultilabelWindowClassificationPerformanceEvaluator

public class WindowClassificationPerformanceEvaluator
extends AbstractOptionHandler
implements ClassificationPerformanceEvaluator

Classification evaluator that updates evaluation results using a sliding window.

Version:

$Revision: 7 $

Author:

Albert Bifet (abifet at cs dot waikato dot ac dot nz)

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	WindowClassificationPerformanceEvaluator.Estimator

Field Summary

Fields

Modifier and Type	Field and Description
protected WindowClassificationPerformanceEvaluator.Estimator[]	classAccuracy
protected WindowClassificationPerformanceEvaluator.Estimator[]	columnKappa
protected double	lastSeenClass
protected int	numClasses
protected WindowClassificationPerformanceEvaluator.Estimator[]	rowKappa
protected double	TotalweightObserved
protected WindowClassificationPerformanceEvaluator.Estimator	weightCorrect
protected WindowClassificationPerformanceEvaluator.Estimator	weightCorrectNoChangeClassifier
protected WindowClassificationPerformanceEvaluator.Estimator	weightObserved
IntOption	widthOption

Fields inherited from class moa.options.AbstractOptionHandler

classOptionNamesToPreparedObjects, options

Constructor Summary

Constructors

Constructor and Description
WindowClassificationPerformanceEvaluator()

Method Summary

Methods

Modifier and Type	Method and Description
void	addResult(weka.core.Instance inst, double[] classVotes) Adds a learning result to this evaluator.
void	getDescription(StringBuilder sb, int indent) Returns a string representation of this object.
double	getFractionCorrectlyClassified()
double	getFractionIncorrectlyClassified()
double	getKappaStatistic()
double	getKappaTemporalStatistic()
Measurement[]	getPerformanceMeasurements() Gets the current measurements monitored by this evaluator.
double	getTotalWeightObserved()
void	prepareForUseImpl(TaskMonitor monitor, ObjectRepository repository) This method describes the implementation of how to prepare this object for use.
void	reset() Resets this evaluator.
void	reset(int numClasses)

Methods inherited from class moa.options.AbstractOptionHandler

copy, discoverOptionsViaReflection, getCLICreationString, getOptions, getPreparedClassOption, getPreparedClassOption, getPurposeString, prepareClassOptions, prepareForUse, prepareForUse

Methods inherited from class moa.AbstractMOAObject

copy, measureByteSize, measureByteSize, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface moa.MOAObject

copy, measureByteSize

Field Detail

widthOption

public IntOption widthOption

TotalweightObserved

protected double TotalweightObserved

weightObserved

protected WindowClassificationPerformanceEvaluator.Estimator weightObserved

weightCorrect

protected WindowClassificationPerformanceEvaluator.Estimator weightCorrect

weightCorrectNoChangeClassifier

protected WindowClassificationPerformanceEvaluator.Estimator weightCorrectNoChangeClassifier

lastSeenClass

protected double lastSeenClass

columnKappa

protected WindowClassificationPerformanceEvaluator.Estimator[] columnKappa

rowKappa

protected WindowClassificationPerformanceEvaluator.Estimator[] rowKappa

classAccuracy

protected WindowClassificationPerformanceEvaluator.Estimator[] classAccuracy

numClasses

protected int numClasses

Constructor Detail

WindowClassificationPerformanceEvaluator

public WindowClassificationPerformanceEvaluator()

Method Detail

reset

public void reset()

Description copied from interface: ClassificationPerformanceEvaluator

Resets this evaluator. It must be similar to starting a new evaluator from scratch.

Specified by:

reset in interface ClassificationPerformanceEvaluator

reset

public void reset(int numClasses)

addResult

public void addResult(weka.core.Instance inst,
             double[] classVotes)

Description copied from interface: ClassificationPerformanceEvaluator

Adds a learning result to this evaluator.

Specified by:

addResult in interface ClassificationPerformanceEvaluator

Parameters:

inst - the instance to be classified

classVotes - an array containing the estimated membership probabilities of the test instance in each class

getPerformanceMeasurements

public Measurement[] getPerformanceMeasurements()

Description copied from interface: ClassificationPerformanceEvaluator

Gets the current measurements monitored by this evaluator.

Specified by:

getPerformanceMeasurements in interface ClassificationPerformanceEvaluator

Returns:

an array of measurements monitored by this evaluator

getTotalWeightObserved

public double getTotalWeightObserved()

getFractionCorrectlyClassified

public double getFractionCorrectlyClassified()

getKappaStatistic

public double getKappaStatistic()

getKappaTemporalStatistic

public double getKappaTemporalStatistic()

getFractionIncorrectlyClassified

public double getFractionIncorrectlyClassified()

getDescription

public void getDescription(StringBuilder sb,
                  int indent)

Description copied from interface: MOAObject

Returns a string representation of this object. Used in AbstractMOAObject.toString to give a string representation of the object.

Specified by:

getDescription in interface MOAObject

Parameters:

sb - the stringbuilder to add the description

indent - the number of characters to indent

prepareForUseImpl

public void prepareForUseImpl(TaskMonitor monitor,
                     ObjectRepository repository)

Description copied from class: AbstractOptionHandler

This method describes the implementation of how to prepare this object for use. All classes that extends this class have to implement prepareForUseImpl and not prepareForUse since prepareForUse calls prepareForUseImpl.

Specified by:

prepareForUseImpl in class AbstractOptionHandler

Parameters:

monitor - the TaskMonitor to use

repository - the ObjectRepository to use