net.librec.similarity

Class CPCSimilarity

java.lang.Object

net.librec.similarity.AbstractRecommenderSimilarity

net.librec.similarity.CPCSimilarity

All Implemented Interfaces:

RecommenderSimilarity

public class CPCSimilarity
extends AbstractRecommenderSimilarity

Constrained Pearson Correlation (CPC)

Author:

zhanghaidong

Field Summary

Fields inherited from class net.librec.similarity.AbstractRecommenderSimilarity

conf, similarityMatrix

Constructor Summary

Constructors

Constructor and Description
CPCSimilarity()

Method Summary

Methods

Modifier and Type	Method and Description
void	buildSimilarityMatrix(DataModel dataModel) Build social similarity matrix with trainMatrix in dataModel.
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

buildSocialSimilarityMatrix, getCorrelation, getSimilarityMatrix

Methods inherited from class java.lang.Object

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

Constructor Detail

CPCSimilarity

public CPCSimilarity()

Method Detail

buildSimilarityMatrix

public void buildSimilarityMatrix(DataModel dataModel)

Build social similarity matrix with trainMatrix in dataModel.

Specified by:

buildSimilarityMatrix in interface RecommenderSimilarity

Overrides:

buildSimilarityMatrix in class AbstractRecommenderSimilarity

Parameters:

dataModel - the input data model

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