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• W2292553612 abstract "Feature selection in the data with different types of feature values, i.e., the heterogeneous or mixed data, is especially of practical importance because such types of data sets widely exist in real world. The key issue for feature selection in mixed data is how to properly deal with different types of the features or attributes in the data set. Motivated by the fuzzy rough set theory which allows different fuzzy relations to be defined for different types of attributes to measure the similarity between objects and in view of the effectiveness of entropy to measure information uncertainty, we propose in this paper a fuzzy rough set-based information entropy for feature selection in a mixed data set. It is proved that the newly-defined entropy meets the common requirement of monotonicity and can equivalently characterize the existing attribute reductions in the fuzzy rough set theory. Then, a feature selection algorithm is formulated based on the proposed entropy and a filter-wrapper method is suggested to select the best feature subset in terms of classification accuracy. An extensive numerical experiment is further conducted to assess the performance of the feature selection method and the results are satisfactory. HighlightsA novel fuzzy rough set-based information entropy is constructed for mixed data.The proposed entropy can equivalently characterize the existing attribute reductions in the fuzzy rough set theory.A feature selection algorithm is formulated based on the proposed entropy.A filter-wrapper method is suggested to select a best feature subset." @default.
• W2292553612 created "2016-06-24" @default.
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• W2292553612 date "2016-08-01" @default.
• W2292553612 modified "2023-10-16" @default.
• W2292553612 title "Feature selection in mixed data: A method using a novel fuzzy rough set-based information entropy" @default.
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• W2292553612 doi "https://doi.org/10.1016/j.patcog.2016.02.013" @default.
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