ofw: An R package to select continuous variables for multiclass classification with a stochastic wrapper method

Le Cao, Kim-Anh and Chabrier, Patrick (2008) ofw: An R package to select continuous variables for multiclass classification with a stochastic wrapper method. Journal of Statistical Software, 28 9: 1-16.

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Author Le Cao, Kim-Anh
Chabrier, Patrick
Title ofw: An R package to select continuous variables for multiclass classification with a stochastic wrapper method
Journal name Journal of Statistical Software   Check publisher's open access policy
ISSN 1548-7660
Publication date 2008-11
Sub-type Article (original research)
Open Access Status File (Publisher version)
Volume 28
Issue 9
Start page 1
End page 16
Total pages 16
Place of publication Los Angeles, CA, U.S.A.
Publisher American Statistical Association
Language eng
Subject 0104 Statistics
Abstract When dealing with high dimensional and low sample size data, feature selection is often needed to help reduce the dimension of the variable space while optimizing the classification task. Few tools exist for selecting variables in such data sets, especially when classes are numerous ( > 2). We have developed ofw, an R package that implements, in the context of classification, the meta algorithm "optimal feature weighting". We focus on microarray data, although the method can be applied to any p >> n problems with continuous variables. The aim is to select relevant variables and to numerically evaluate the resulting variable selection. Two versions are proposed with the application of supervised multiclass classifiers such as classification and regression trees and support vector machines. Furthermore, a weighted approach can be chosen to deal with unbalanced multiclasses, a common characteristic in microarray data sets.
Keyword Feature selection
Stochastic algorithm
Classication
Unbalanced multiclass
Microarray
Q-Index Code C1
Q-Index Status Provisional Code
Additional Notes Published online

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
Institute for Molecular Bioscience - Publications
 
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Created: Fri, 28 May 2010, 12:18:25 EST by Mary-Anne Marrington on behalf of Institute for Molecular Bioscience