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A Metahierarchical Rule Decision System to Design Robust Fuzzy Classifiers Based on Data Complexity
Authors: Javier Cózar, Alberto Fernández, Francisco Herrera, José A. Gámez
Publication: IEEE Transactions on Fuzzy Systems (TFS)
Issue: Volume 27, Issue 4 – April 2019
Abstract: There is a wide variety of studies that propose different classifiers to solve a large amount of problems in distinct classification scenarios. The no free lunch theorem states that if we use a big enough set of varied problems, all classifiers would be equivalent in performance. From another point of view, the performance of the classifiers is dependant of the scope and properties of the datasets. In this sense, new proposals on the topic often focus on a given context, aiming at improving the related state-of-the-art approaches. Data complexity metrics have been traditionally used to determine the inner characteristics of datasets. This way, researchers are able to categorize the problems in different scenarios. Then, this taxonomy can be applied to determine inner characteristics of the datasets in order to determine intervals of good and bad behavior for a given classifier. In this paper, we will take advantage of the data complexity metrics in order to design a fuzzy metaclassifier. The final goal is to create decision rules based on the inner characteristics of the data to apply a different version of the fuzzy classifier for a given problem. To do so, we will make use of the FARC-HD classifier, an evolutionary fuzzy system that has led to different extensions in the specialized literature. Experimental results show the goodness of this novel approach as it is able to outperform all versions of FARC-HD on a wide set of problems, and obtain competitive results (in terms of performance and interpretability) versus two selected state-of-the-art rule-based classification system, C4.5 and FURIA.
Index Terms: Data complexity metrics (DCM), evolutionary fuzzy system, fuzzy rule based classification system, metaclassifier
IEEE Xplore Link: https://ieeexplore.ieee.org/document/8444672