moa.evaluation

Class BasicClassificationPerformanceEvaluator

java.lang.Object

moa.AbstractMOAObject

moa.evaluation.BasicClassificationPerformanceEvaluator

All Implemented Interfaces:

Serializable, ClassificationPerformanceEvaluator, MOAObject

public class BasicClassificationPerformanceEvaluator
extends AbstractMOAObject
implements ClassificationPerformanceEvaluator

Classification evaluator that performs basic incremental evaluation.

Version:

$Revision: 7 $

Author:

Richard Kirkby (rkirkby@cs.waikato.ac.nz), Albert Bifet (abifet at cs dot waikato dot ac dot nz)

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected double[]	columnKappa
protected int	numClasses
protected double[]	rowKappa
protected double	weightCorrect
protected double	weightObserved

Constructor Summary

Constructors

Constructor and Description
BasicClassificationPerformanceEvaluator()

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	reset() Resets this evaluator.
void	reset(int numClasses)

Methods inherited from class moa.AbstractMOAObject

copy, 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

weightObserved

protected double weightObserved

weightCorrect

protected double weightCorrect

columnKappa

protected double[] columnKappa

rowKappa

protected double[] rowKappa

numClasses

protected int numClasses

Constructor Detail

BasicClassificationPerformanceEvaluator

public BasicClassificationPerformanceEvaluator()

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()

getFractionIncorrectlyClassified

public double getFractionIncorrectlyClassified()

getKappaStatistic

public double getKappaStatistic()

getKappaTemporalStatistic

public double getKappaTemporalStatistic()

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