Multi-class classification using a signomial function |
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Authors: | Kyoungmi Hwang Kyungsik Lee Chungmok Lee Sungsoo Park |
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Affiliation: | 1.KAIST,Daejeon,South Korea;2.Seoul National University, Seoul, Republic of Korea; Hankuk University of Foreign Studies,Yongin-si,Republic of Korea;3.IBM Research—Ireland,Dublin,Ireland |
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Abstract: | We propose two multi-class classification methods using a signomial function. Each of these methods directly constructs a multi-class classifier by solving a single optimization problem. Since the number of possible signomial terms is extremely large, we propose a column generation method that iteratively generates good signomial terms. Both of these methods obtain better or comparable classification accuracies than existing methods and also provide more sparse classifiers. |
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