This repository contains the code needed to reproduce the experiments of the paper:

J. Sanz-Cruzado, C. Macdonald, I. Ounis, P. Castells. Axiomatic Analysis of Contact Recommendation Methods in Social Networks: an IR perspective. 13th ACM Conference on Recommender Systems (ECIR 2020). Lisbon, Portugal, April 2020.

Information Retrieval Group at Universidad Autónoma de Madrid

• Javier Sanz-Cruzado ([email protected])
• Pablo Castells ([email protected])

Terrier Group at University of Glasgow

• Craig Macdonald ([email protected])
• Iadh Ounis ([email protected])

This repository contains all the needed classes to reproduce the experiments explained in the paper. The software contains the following packages:

• es.uam.eps.ir.contactrecaxioms.data: Classes for handling the ratings by users for items. Extension of the RankSys preference data that use graphs.
• es.uam.eps.ir.contactrecaxioms.graph: Classes for handling network data.
• es.uam.eps.ir.contactrecaxioms.main: Main programs and auxiliar classes.
• es.uam.eps.ir.contactrecaxioms.metrics: Classes implementing the metrics used in the experiments which are not provided by RankSys.
• es.uam.eps.ir.contactrecaxioms.recommenders: Implementation of recommendation algorithms.
• es.uam.eps.ir.contactrecaxioms.utils: Additional classes, useful for the rest of the program.

Java JDK: 1.8 or above.

Maven: tested with version 3.6.0.

In order to install this program, you need to have Maven (https://maven.apache.org) installed on your system. Then, download the files into a directory, and execute the following command:

mvn compile assembly::single

If you do not want to use Maven, it is still possible to compile the code using any Java compiler. In that case, you will need the following libraries:

• Ranksys version 0.4.3: http://ranksys.github.io
• Colt version 1.2.0: https://dst.lbl.gov/ACSSoftware/colt
• Google MTJ version 1.0.4: https://github.com/fommil/matrix-toolkits-java
• Terrier version 5.1: http://terrier.org/
• FastUtil version 8.3.0: http://fastutil.di.unimi.it/

The descriptions for the different programs is included in the Wiki for this project. We include here the links to the descriptions of each program.

• EWC1
• EWC2
• EWC3
• NDC
• CLNCS
• Degree
• Validation

[1] Sanz-Cruzado, J., Castells, P. Information Retrieval Models for Contact Recommendation in Social Networks. In: ECIR 2019: Advances in Information Retrieval, pp. 148–163. No. 11437 in LNCS, Springer International Publishing, Cologne, Germany (2019)