net.librec.similarity

Class KRCCSimilarity

java.lang.Object

net.librec.similarity.AbstractRecommenderSimilarity

net.librec.similarity.KRCCSimilarity

All Implemented Interfaces:

RecommenderSimilarity

public class KRCCSimilarity
extends AbstractRecommenderSimilarity

J. I. Marden, Analyzing and modeling rank data. Boca Raton, Florida: CRC Press, 1996. Mingming Chen etc. A Ranking-oriented Hybrid Approach to QoS-aware Web Service Recommendation. 2015

Kendall Rank Correlation Coefficient

Author:

zhanghaidong

Field Summary

Fields inherited from class net.librec.similarity.AbstractRecommenderSimilarity

conf, similarityMatrix

Constructor Summary

Constructors

Constructor and Description
KRCCSimilarity()

Method Summary

Methods

Modifier and Type	Method and Description
double	getCorrelation(SparseVector thisVector, SparseVector thatVector) Find the common rated items by this user and that user, or the common users have rated this item or that item.
protected double	getSimilarity(java.util.List<? extends java.lang.Number> thisList, java.util.List<? extends java.lang.Number> thatList) Calculate the similarity between thisList and thatList.

Methods inherited from class net.librec.similarity.AbstractRecommenderSimilarity

buildSimilarityMatrix, buildSocialSimilarityMatrix, getSimilarityMatrix

Methods inherited from class java.lang.Object

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

Constructor Detail

KRCCSimilarity

public KRCCSimilarity()

Method Detail

getCorrelation

public double getCorrelation(SparseVector thisVector,
                    SparseVector thatVector)

Find the common rated items by this user and that user, or the common users have rated this item or that item. And then return the similarity.

Overrides:

getCorrelation in class AbstractRecommenderSimilarity

Parameters:

thisVector: - the rated items by this user, or users that have rated this item .

thatVector: - the rated items by that user, or users that have rated that item.

Returns:

similarity

getSimilarity

protected double getSimilarity(java.util.List<? extends java.lang.Number> thisList,
                   java.util.List<? extends java.lang.Number> thatList)

Calculate the similarity between thisList and thatList.

Specified by:

getSimilarity in class AbstractRecommenderSimilarity

Parameters:

thisList - this list

thatList - that list

Returns:

similarity