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Kernel-based linear classification on categorical data
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DOI：10.1007/s00500-015-1926-8.png)
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Kernel-based methods have been widely investigated in the soft-computing community. However, they focus mainly on numeric data. In this paper, we propose a novel method for kernel learning on categorical data, and show how the method can be used to derive effective classifiers for linear classification. Based on kernel density estimation for categorical attributes, three popular classification methods, i.e., Naive Bayes, nearest neighbor and prototype-based classification, are effectively extended to classify categorical data. We also propose two data-driven approaches to the bandwidth selection problem, with one aimed at minimizing the mean squared error of the kernel estimate and the other endeavored to attribute weights optimization. Theoretical analysis indicates that, as in the numeric case, kernel learning of categorical attributes is capable to make the classes to be more separable, resulting in outstanding performances of the new classifiers on various real-world data sets.
Keyword:
Data classification
Categorical attributes
Kernel density estimation
Naive Bayes
Nearest neighbor
Prototype-based classification
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2.5
论文数:
1.0W
被引数:
2.1W
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