Notes on Rough Set Approximations and Associated Measures |
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| Authors: | YAO Yiyu |
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| Institution: | Department of Computer Science, University of Regina, Regina, Saskatchewan, Canada. S4S 0A2 |
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| Abstract: | We review and compare two definitions of rough set approximations.One is defined by a pair of sets in the universe and the other by a pair of sets in the quotient universe.The latter definition,although less studied,is semantically superior for interpreting rule induction and is closely related to granularity switching in granular computing.Numerical measures about the accuracy and quality of approximations are examined.Several semantics difficulties are commented. |
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| Keywords: | Accuracy measures Granularity Rough set approximations Roughness |
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