Correlation-based feature selection strategy in classification problems

• Autorzy: Krzysztof Michalak , Halina Kwaśnicka
• Języki publikacji: EN

Abstrakty

EN

In classification problems, the issue of high dimensionality, of data is often considered important. To lower data dimensionality, feature selection methods are often employed. To select a set of features that will span a representation space that is as good as possible for the classification task, one must take into consideration possible interdependencies between the features. As a trade-off between the complexity of the selection process and the quality of the selected feature set, a pairwise selection strategy has been recently suggested. In this paper, a modified pairwise selection strategy is proposed. Our research suggests that computation time can be significantly lowered while maintaining the quality of the selected feature sets by using mixed univariate and bivariate feature evaluation based on the correlation between the features. This paper presents the comparison of the performance of our method with that of the unmodified pairwise selection strategy based on several well-known benchmark sets. Experimental results show that, in most cases, it is possible to lower computation time and that with high statistical significance the quality of the selected feature sets is not lower compared with those selected using the unmodified pairwise selection process.

Słowa kluczowe

EN

feature selection; pattern classification; feature correlation; pairwise feature evaluation

• Wydawca: University of Zielona Gora Press
• Czasopismo: International Journal of Applied Mathematics and Computer Science
• Rocznik: 2006
• Tom: 16
• Numer: 4
• Strony: 503-511

Daty

wydano

2006

otrzymano

2006-05-02

poprawiono

2006-10-06

Twórcy

autor

Krzysztof Michalak

• Wrocław University of Technology, Institute of Applied Informatics, ul. Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

autor

Halina Kwaśnicka

• Wrocław University of Technology, Institute of Applied Informatics, ul. Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

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