org.apache.mahout.cf.taste.eval
Interface IRStatistics

All Known Implementing Classes:
IRStatisticsImpl

public interface IRStatistics

Implementations encapsulate information retrieval-related statistics about a Recommender's recommendations.

See Information retrieval.


Method Summary
 double getF1Measure()
           See F-measure.
 double getFallOut()
           See Fall-Out.
 double getFNMeasure(double n)
           See F-measure.
 double getNormalizedDiscountedCumulativeGain()
           See Normalized Discounted Cumulative Gain.
 double getPrecision()
           See Precision.
 double getReach()
           
 double getRecall()
           See Recall.
 

Method Detail

getPrecision

double getPrecision()

See Precision.


getRecall

double getRecall()

See Recall.


getFallOut

double getFallOut()

See Fall-Out.


getF1Measure

double getF1Measure()

See F-measure.


getFNMeasure

double getFNMeasure(double n)

See F-measure.


getNormalizedDiscountedCumulativeGain

double getNormalizedDiscountedCumulativeGain()

See Normalized Discounted Cumulative Gain.


getReach

double getReach()
Returns:
the fraction of all users for whom recommendations could be produced


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