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On feature selection in a class of distribution-free pattern classifiers

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1 Author(s)

A feature-selection procedure is proposed for the class of distribution-free pattern classifiers [1], [2]. The selection procedure can be readily carried out on fixed (large) training samples using matrix inversion. If direct matrix inversion is to be avoided, the approximation method [4] or the stochastic-approximation procedure [2] can be applied to the training samples. The proposed procedure, aside from furnishing a statistical interpretation, has a mapping interpretation. It has the unique property of designing a pattern classifier under a single-performance criterion instead of the conventional division of receptor and categorizer. It enables the system to come closest to the minimum-risk ideal classifier. In particular, for two-class problems having normal distributions with equal covariance matrices, equal costs for misrecognition, and equal a priori probabilities, the proposed procedure yields the optimum Bayes procedure without the knowledge of the class distributions. Furthermore, the proposed feature-selection procedure is the same as that of the divergence computation. Experimental results are presented. They are considered satisfactory.

Published in:

Information Theory, IEEE Transactions on  (Volume:16 ,  Issue: 1 )

Date of Publication:

Jan 1970

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