org.apache.mahout.cf.taste.impl.eval

Class IRStatisticsImpl

java.lang.Object

org.apache.mahout.cf.taste.impl.eval.IRStatisticsImpl

All Implemented Interfaces:

Serializable, IRStatistics

public final class IRStatisticsImpl
extends Object
implements IRStatistics, Serializable

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
double	getF1Measure() See F-measure.
double	getFallOut() See Fall-Out.
double	getFNMeasure(double b) See F-measure.
double	getNormalizedDiscountedCumulativeGain() See Normalized Discounted Cumulative Gain.
double	getPrecision() See Precision.
double	getReach()
double	getRecall() See Recall.
String	toString()

Methods inherited from class java.lang.Object

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

Method Detail

getPrecision

public double getPrecision()

Description copied from interface: IRStatistics

See Precision.

Specified by:

getPrecision in interface IRStatistics

getRecall

public double getRecall()

Description copied from interface: IRStatistics

See Recall.

Specified by:

getRecall in interface IRStatistics

getFallOut

public double getFallOut()

Description copied from interface: IRStatistics

See Fall-Out.

Specified by:

getFallOut in interface IRStatistics

getF1Measure

public double getF1Measure()

Description copied from interface: IRStatistics

See F-measure.

Specified by:

getF1Measure in interface IRStatistics

getFNMeasure

public double getFNMeasure(double b)

Description copied from interface: IRStatistics

See F-measure.

Specified by:

getFNMeasure in interface IRStatistics

getNormalizedDiscountedCumulativeGain

public double getNormalizedDiscountedCumulativeGain()

Description copied from interface: IRStatistics

See Normalized Discounted Cumulative Gain.

Specified by:

getNormalizedDiscountedCumulativeGain in interface IRStatistics

getReach

public double getReach()

Specified by:

getReach in interface IRStatistics

Returns:

the fraction of all users for whom recommendations could be produced

toString

public String toString()

Overrides:

toString in class Object