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- P-ISSN1225-598X
- E-ISSN2982-6292
한글 웹 문서 클러스터링 성능향상을 위한 자질선정 기법 비교 연구
Comparative Study of Feature Selection Methods for Korean Web Documents Clustering
Abstract
This paper is a comparative study of feature selection methods for Korean web documents clustering. First, we focused on how the term feature and the co-link of web documents affect clustering performance. We clustered web documents by native term feature, co-link and both, and compared the output results with the originally allocated category. And we selected term features for each category using X2, Information Gain (IG), and Mutual Information (MI) from training documents, and applied these features to other experimental documents. In addition we suggested a new method named Max Feature Selection, which selects terms that have the maximum count for a category in each experimental document, and applied X2 (or MI or IG) values to each term instead of term frequency of documents, and clustered them. In the results, X2 shows a better performance than IG or MI, but the difference appears to be slight. But when we applied the Max Feature Selection Method, the clustering performance improved notably. Max Feature Selection is a simple but effective means of feature space reduction and shows powerful performance for Korean web document clustering.
- keywords
- 클러스터링, 자질선정 기법, 한글 웹 문서, 최댓값 자질선정 기법, Clustering, Feature Selection Methods, Korean Web Documents, Max Feature Selection
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