ai.libs.jaicore.ml.dyadranking.loss

Class NDCGLoss

java.lang.Object

ai.libs.jaicore.ml.dyadranking.loss.NDCGLoss

All Implemented Interfaces:

DyadRankingLossFunction

public class NDCGLoss
extends java.lang.Object
implements DyadRankingLossFunction

The Normalized Discounted Cumulative Gain for ranking.

Constructor Summary

Constructors

Constructor and Description
NDCGLoss(int l)

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Detail

NDCGLoss

public NDCGLoss(int l)

Parameters:

l - The position up to which to compute the cumulative gain (zero-indexed, exclusive).

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

getL

public int getL()

setL

public void setL(int l)