Focused Ensemble Selection: A Diversity-Based Method for Greedy Ensemble Selection

  • Authors:
  • Ioannis Partalas;Grigorios Tsoumakas;Ioannis Vlahavas

  • Affiliations:
  • Department of Informatics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece, email: partalas@csd.auth.gr;Department of Informatics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece, email: greg@csd.auth.gr;Department of Informatics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece, email: vlahavas@csd.auth.gr

  • Venue:
  • Proceedings of the 2008 conference on ECAI 2008: 18th European Conference on Artificial Intelligence
  • Year:
  • 2008

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Abstract

Ensemble selection deals with the reduction of an ensemble of predictive models in order to improve its efficiency and predictive performance. A number of ensemble selection methods that are based on greedy search of the space of all possible ensemble subsets have recently been proposed. This paper contributes a novel method, based on a new diversity measure that takes into account the strength of the decision of the current ensemble. Experimental comparison of the proposed method, dubbed Focused Ensemble Selection (FES), against state-of-the-art greedy ensemble selection methods shows that it leads to small ensembles with high predictive performance.