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Ensemble variable selection using genetic algorithm
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Type
Academic journal
Author
Seogyoung Lee (Korea University) Martin Seunghwan Yang (Korea University) Jongkyeong Kang (Kangwon National University) Seung Jun Shin (Korea University)
Journal
한국통계학회 CSAM(Communications for Statistical Applications and Methods) Vol.29 No.6 KCI Accredited Journals SCOPUS
Published
2022.11
Pages
629 - 640 (12page)

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Ensemble variable selection using genetic algorithm
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Abstract· Keywords

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Variable selection is one of the most crucial tasks in supervised learning, such as regression and classification. The best subset selection is straightforward and optimal but not practically applicable unless the number of predictors is small. In this article, we propose directly solving the best subset selection via the genetic algorithm (GA), a popular stochastic optimization algorithm based on the principle of Darwinian evolution. To further improve the variable selection performance, we propose to run multiple GA to solve the best subset selection and then synthesize the results, which we call ensemble GA (EGA). The EGA significantly improves variable selection performance. In addition, the proposed method is essentially the best subset selection and hence applicable to a variety of models with different selection criteria. We compare the proposed EGA to existing variable selection methods under various models, including linear regression, Poisson regression, and Cox regression for survival data. Both simulation and real data analysis demonstrate the promising performance of the proposed method.
#genetic algorithm #ensemble learning #generalized linear model #cox regression

Contents

Abstract
1. Introduction
2. Variable selection via genetic algorithm
3. Ensemble GA for variable selection
4. Simulation studies
5. Real data analysis
6. Concluding remarks
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