On the discriminative power of Hyper-parameters in Cross-Validation and how to choose them

13th ACM Conference on Recommender Systems, page 447-451 - 2019
Download the publication : 2019_Anelli_RECSYS2019.pdf [684Ko]  
Hyper-parameters tuning is a crucial task to make a model perform at its best. However, despite the well-established methodologies, some aspects of the tuning remain unexplored. As an example, it may afect not just accuracy but also novelty as well as it may depend on the adopted dataset. Moreover, sometimes it could be sufcient to concentrate on a single parameter only (or a few of them) instead of their overall set. In this paper we report on our investigation on hyper-parameters tuning by performing an extensive 10-Folds Cross-Validation on MovieLens and Amazon Movies for three well-known baselines: User-kNN, Item-kNN, BPR-MF. We adopted a grid search strategy considering approximately 15 values for each parameter, and we then evaluated each combination of parameters in terms of accuracy and novelty. We investigated the discriminative power of nDCG, Precision, Recall, MRR, EFD, EPC, and, fnally, we analyzed the role of parameters on model evaluation for Cross-Validation

BibTex references


@InProceedings{ADDPR19,
author = {Vito Walter Anelli and Tommaso {Di Noia} and Eugenio {Di Sciascio} and Claudio Pomo and Azzurra Ragone},
title = "On the discriminative power of Hyper-parameters in
Cross-Validation and how to choose them",
booktitle = "13th ACM Conference on Recommender Systems",
pages = "447-451",
year = "2019",
publisher = "ACM",
url = "http://www-ictserv.poliba.it/publications/2019/ADD
PR19"
}

Other publications in the database

SisInf Lab - Information Systems Laboratory

Research group of Politecnico di Bari
Edoardo Orabona St, 4 Bari, Italy