de.lmu.ifi.dbs.elki.evaluation.scores

Class AveragePrecisionEvaluation

java.lang.Object

de.lmu.ifi.dbs.elki.evaluation.scores.AbstractScoreEvaluation

de.lmu.ifi.dbs.elki.evaluation.scores.AveragePrecisionEvaluation

All Implemented Interfaces:

ScoreEvaluation

public class AveragePrecisionEvaluation
extends AbstractScoreEvaluation

Evaluate using average precision.

Author:

Erich Schubert

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	AveragePrecisionEvaluation.Parameterizer Parameterization class.

Nested classes/interfaces inherited from interface de.lmu.ifi.dbs.elki.evaluation.scores.ScoreEvaluation

ScoreEvaluation.Predicate<T>, ScoreEvaluation.ScoreIter

Field Summary

Fields

Modifier and Type	Field and Description
static AveragePrecisionEvaluation	STATIC Static instance

Constructor Summary

Constructors

Constructor and Description
AveragePrecisionEvaluation()

Method Summary

Methods

Modifier and Type	Method and Description
<I extends ScoreEvaluation.ScoreIter> double	evaluate(ScoreEvaluation.Predicate<? super I> predicate, I iter) Evaluate a given predicate and iterator.
double	expected(int pos, int all) Expected score for a random result.

Methods inherited from class de.lmu.ifi.dbs.elki.evaluation.scores.AbstractScoreEvaluation

evaluate, evaluate, evaluate

Methods inherited from class java.lang.Object

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

Field Detail

STATIC

public static final AveragePrecisionEvaluation STATIC

Static instance

Constructor Detail

AveragePrecisionEvaluation

public AveragePrecisionEvaluation()

Method Detail

evaluate

public <I extends ScoreEvaluation.ScoreIter> double evaluate(ScoreEvaluation.Predicate<? super I> predicate,
                                                    I iter)

Description copied from interface: ScoreEvaluation

Evaluate a given predicate and iterator.

Type Parameters:

I - Iterator type

Parameters:

predicate - Predicate (for positives)

iter - Iterator

Returns:

Score

expected

public double expected(int pos,
              int all)

Description copied from interface: ScoreEvaluation

Expected score for a random result.

Parameters:

pos - Number of positive elements

all - Total number of elements

Returns:

Expected score