es.uam.eps.ir.ranksys.novdiv.distance

Interface ItemDistanceModel<I>

Type Parameters:

I - type of the items

All Known Implementing Classes:

CosineFeatureItemDistanceModel, FeatureItemDistanceModel, JaccardFeatureItemDistanceModel, VectorFeatureItemDistanceModel

public interface ItemDistanceModel<I>

Item distance model. S. Vargas. Novelty and diversity evaluation and enhancement in Recommender Systems. PhD Thesis. S. Vargas and P. Castells. Rank and relevance in novelty and diversity for Recommender Systems. RecSys 2011.

Author:

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

Method Summary

Modifier and Type	Method and Description
ToDoubleFunction<I>	dist(I i) Returns a function that return the distance to the input item.
default double	dist(I i, I j) Returns the distance between a pair of items.

Method Detail

dist

ToDoubleFunction<I> dist(I i)

Returns a function that return the distance to the input item.

Parameters:

i - item

Returns:

function that return the distance to the input item

dist

default double dist(I i,
                    I j)

Returns the distance between a pair of items.

Parameters:

i - first item

j - second item

Returns:

distance between the items