Automatic Grammatical Evolution-Based Optimization of Matrix Factorization Algorithm

Matevž Kunaver, Árpád Bűrmen and Iztok Fajfar
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Matevž Kunaver: Faculty of Electrical Engineering, University of Ljubljana, 1000 Ljubljana, Slovenia
Árpád Bűrmen: Faculty of Electrical Engineering, University of Ljubljana, 1000 Ljubljana, Slovenia
Iztok Fajfar: Faculty of Electrical Engineering, University of Ljubljana, 1000 Ljubljana, Slovenia

Mathematics, 2022, vol. 10, issue 7, 1-22

Abstract: Nowadays, recommender systems are vital in lessening the information overload by filtering out unnecessary information, thus increasing comfort and quality of life. Matrix factorization (MF) is a well-known recommender system algorithm that offers good results but requires a certain level of system knowledge and some effort on part of the user before use. In this article, we proposed an improvement using grammatical evolution (GE) to automatically initialize and optimize the algorithm and some of its settings. This enables the algorithm to produce optimal results without requiring any prior or in-depth knowledge, thus making it possible for an average user to use the system without going through a lengthy initialization phase. We tested the approach on several well-known datasets. We found our results to be comparable to those of others while requiring a lot less set-up. Finally, we also found out that our approach can detect the occurrence of over-saturation in large datasets.

Keywords: matrix factorization; genetic programming; grammatical evolution; recommender systems; meta-optimization (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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