Rule extraction with rough-fuzzy hybridization method

Authors:
Nan-Chen Hsieh
Affiliations:
Department of Information Management, National Taipei College of Nursing, Taipei, Taiwan, R.O.C.
Venue:
PAKDD'08 Proceedings of the 12th Pacific-Asia conference on Advances in knowledge discovery and data mining
Year:
2008

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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.