Original title: Sequential Retreating Search Methods in Feature Selection
Authors: Somol, Petr ; Pudil, Pavel
Document type: Research reports
Year: 2010
Language: eng
Series: Research Report, volume: 2286
Abstract: Inspired by Floating Search, our new pair of methods, the Sequential Forward Retreating Search (SFRS) and Sequential Backward Retreating Search (SBRS) is exceptionally suitable for Wrapper based feature selection. (Conversely, it cannot be used with monotonic criteria.) Unlike most of other known sub-optimal search methods, both the SFRS and SBRS are parameter-free deterministic sequential procedures that incorporate in the optimization process both the search for the best subset and the determination of the best subset size. The subset yielded by either of the two new methods is to be expected closer to optimum than the best of all subsets yielded in one run of the Floating Search. Retreating Search time complexity is to be expected slightly worse but in the same order of magnitude as that of the Floating Search. In addition to introducing the new methods we provide a testing framework to evaluate them with respect to other existing tools.
Keywords: classifier performance; feature selection; method evaluation; pattern recognition; sequential search; subset search; wrappers
Project no.: CEZ:AV0Z10750506 (CEP), 1M0572 (CEP), GA402/03/1310 (CEP), IAA2075302 (CEP), 2C06019 (CEP)
Funding provider: GA MŠk, GA ČR, GA AV ČR, GA MŠk

Institution: Institute of Information Theory and Automation AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0195586

Permalink: http://www.nusl.cz/ntk/nusl-42600


The record appears in these collections:
Research > Institutes ASCR > Institute of Information Theory and Automation
Reports > Research reports