es.uam.eps.ir.ranksys.metrics.rank

Class ExponentialDiscountModel

java.lang.Object

es.uam.eps.ir.ranksys.metrics.rank.ExponentialDiscountModel

All Implemented Interfaces:

RankingDiscountModel

public class ExponentialDiscountModel
extends Object
implements RankingDiscountModel

Exponential ranking discount: disc(k) = base^k.

Author:

Saúl Vargas (saul.vargas@uam.es), Pablo Castells (pablo.castells@uam.es)

Constructor Summary

Constructors

Constructor and Description
ExponentialDiscountModel(double base) Constructor.

Method Summary

Modifier and Type	Method and Description
double	disc(int k) Discount to be applied at a given position.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExponentialDiscountModel

public ExponentialDiscountModel(double base)

Constructor.

Parameters:

base - base of the exponent

Method Detail

disc

public double disc(int k)

Discount to be applied at a given position.

Specified by:

disc in interface RankingDiscountModel

Parameters:

k - position in the recommendation list starting from 0

Returns:

discount to be applied for the given rank position