it.uniroma2.sag.kelp.utils.evaluation

Class BinaryClassificationEvaluator

java.lang.Object

it.uniroma2.sag.kelp.utils.evaluation.Evaluator

it.uniroma2.sag.kelp.utils.evaluation.BinaryClassificationEvaluator

public class BinaryClassificationEvaluator
extends Evaluator

This is an instance of an Evaluator. It allows to compute the some common measure for binary classification tasks.

Author:

Simone Filice, Giuseppe Castellucci

Field Summary

Fields inherited from class it.uniroma2.sag.kelp.utils.evaluation.Evaluator

computed

Constructor Summary

Constructors

Constructor and Description
BinaryClassificationEvaluator(Label positiveClass)

Method Summary

Methods

Modifier and Type	Method and Description
void	addCount(Example test, Prediction prediction) This method should be implemented in the subclasses to update counters useful to compute the performance measure
void	clear() Clear all the counters for a new processing.
protected void	compute() This method is intented to force the computation of the performance measure.
BinaryClassificationEvaluator	duplicate() Returns a new instance of this Evaluator
float	getAccuracy() Return the accuracy
float	getF1() Return the f1 of the positive class
float	getFn() Return the false negatives
float	getFp() Return the false positives
float	getPrecision() Return the precision of the positive class
float	getRecall() Return the recall of the positive class
float	getTn() Return the true negatives
float	getTp() Return the true positives

Methods inherited from class it.uniroma2.sag.kelp.utils.evaluation.Evaluator

getPerformanceMeasure

Methods inherited from class java.lang.Object

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

Constructor Detail

BinaryClassificationEvaluator

public BinaryClassificationEvaluator(Label positiveClass)

Method Detail

addCount

public void addCount(Example test,
            Prediction prediction)

Description copied from class: Evaluator

This method should be implemented in the subclasses to update counters useful to compute the performance measure

Specified by:

addCount in class Evaluator

Parameters:

test - the test example

prediction - the prediction of the system

compute

protected void compute()

Description copied from class: Evaluator

This method is intented to force the computation of the performance measure.

Specified by:

compute in class Evaluator

getTp

public float getTp()

Return the true positives

Returns:

true positives

getFp

public float getFp()

Return the false positives

Returns:

false positives

getTn

public float getTn()

Return the true negatives

Returns:

true negatives

getFn

public float getFn()

Return the false negatives

Returns:

false negatives

getAccuracy

public float getAccuracy()

Return the accuracy

Returns:

accuracy

getPrecision

public float getPrecision()

Return the precision of the positive class

Returns:

precision

getRecall

public float getRecall()

Return the recall of the positive class

Returns:

recall

getF1

public float getF1()

Return the f1 of the positive class

Returns:

f1

clear

public void clear()

Clear all the counters for a new processing.

Specified by:

clear in class Evaluator

duplicate

public BinaryClassificationEvaluator duplicate()

Description copied from class: Evaluator

Returns a new instance of this Evaluator

Specified by:

duplicate in class Evaluator

Returns:

a new instance of this Evaluator