ai.libs.jaicore.ml.dyadranking.loss

Class KendallsTauOfTopK

java.lang.Object

ai.libs.jaicore.ml.dyadranking.loss.KendallsTauOfTopK

All Implemented Interfaces:

DyadRankingLossFunction

public class KendallsTauOfTopK
extends java.lang.Object
implements DyadRankingLossFunction

Calculates the kendalls-tau loss only for the top k dyads. https://researcher.watson.ibm.com/researcher/files/us-fagin/topk.pdf

Constructor Summary

Constructors

Constructor and Description
KendallsTauOfTopK(int k, double p)

Method Summary

Modifier and Type	Method and Description
double	loss(IDyadRankingInstance actual, IDyadRankingInstance predicted) Computes the loss between the actual dyad ordering and predicted dyad ordering, represented by dyad ranking instances.

Methods inherited from class java.lang.Object

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

Constructor Detail

KendallsTauOfTopK

public KendallsTauOfTopK(int k,
                         double p)

Method Detail

loss

public double loss(IDyadRankingInstance actual,
                   IDyadRankingInstance predicted)

Description copied from interface: DyadRankingLossFunction

Computes the loss between the actual dyad ordering and predicted dyad ordering, represented by dyad ranking instances.

Specified by:

loss in interface DyadRankingLossFunction

Parameters:

actual - the correct ordering

predicted - the predicted ordering

Returns:

the loss between the predicted and correct ordering, depending on the implementation