Package ciir.umass.edu.metric

Class APScorer

java.lang.Object

ciir.umass.edu.metric.MetricScorer

ciir.umass.edu.metric.APScorer

public class APScorer
extends MetricScorer

Author:

vdang This class implements MAP (Mean Average Precision)

Field Summary

Fields

Modifier and Type	Field	Description
java.util.HashMap<java.lang.String,java.lang.Integer>	relDocCount

Fields inherited from class ciir.umass.edu.metric.MetricScorer

k

Constructor Summary

Constructors

Constructor	Description
APScorer()

Method Summary

Modifier and Type	Method	Description
MetricScorer	copy()
void	loadExternalRelevanceJudgment(java.lang.String qrelFile)
java.lang.String	name()
double	score(RankList rl)	Compute Average Precision (AP) of the list.
double[][]	swapChange(RankList rl)

Methods inherited from class ciir.umass.edu.metric.MetricScorer

getK, getRelevanceLabels, score, setK

Methods inherited from class java.lang.Object

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

Field Detail

relDocCount

public java.util.HashMap<java.lang.String,java.lang.Integer> relDocCount

Constructor Detail

APScorer

public APScorer()

Method Detail

copy

public MetricScorer copy()

Specified by:

copy in class MetricScorer

loadExternalRelevanceJudgment

public void loadExternalRelevanceJudgment(java.lang.String qrelFile)

Overrides:

loadExternalRelevanceJudgment in class MetricScorer

score

public double score(RankList rl)

Compute Average Precision (AP) of the list. AP of a list is the average of precision evaluated at ranks where a relevant document is observed.

Specified by:

score in class MetricScorer

Returns:

AP of the list.

name

public java.lang.String name()

Specified by:

name in class MetricScorer

swapChange

public double[][] swapChange(RankList rl)

Specified by:

swapChange in class MetricScorer