Abstract
This study presents a rough-fuzzy hybridization method to generate fuzzy if-then rules automatically from a medical diagnosis dataset with quantitative data values, based on fuzzy set and rough set theory. The proposed method consists of four stages: preprocessing inputs with fuzzy linguistic representation; rough set theory in finding notable reducts; candidate fuzzy if-then rules generation by data summarization, and truth evaluation the effectiveness of fuzzy if-then rules. The main contributions of the proposed method are the capability of fuzzy linguistic representation of the fuzzy if-then rules, finding concise fuzzy if-then rules from medical diagnosis dataset, and tolerance of imprecise data.
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