Title

FISA: Feature-based Instance Selection for Imbalanced Text Classification

Publication Type

Conference Proceeding Article

Publication Date

4-2006

Abstract

Support Vector Machines (SVM) classifiers are widely used in text classification tasks and these tasks often involve imbalanced training. In this paper, we specifically address the cases where negative training documents significantly outnumber the positive ones. A generic algorithm known as FISA (Feature-based Instance Selection Algorithm), is proposed to select only a subset of negative training documents for training a SVM classifier. With a smaller carefully selected training set, a SVM classifier can be more efficiently trained while delivering comparable or better classification accuracy. In our experiments on the 20-Newsgroups dataset, using only 35% negative training examples and 60% learning time, methods based on FISA delivered much better classification accuracy than those methods using all negative training documents.

Keywords

Vector support machine, Statistical analysis, Electronic discussion group, Classification, Natural language, Text, Information retrieval, Content analysis, Data analysis, Knowledge discovery, Data mining

Discipline

Databases and Information Systems | Numerical Analysis and Scientific Computing

Research Areas

Data Management and Analytics

Publication

Advances in Knowledge Discovery and Data Mining: 10th Pacific-Asia Conference, PAKDD 2006, Singapore, April 9-12: Proceedings

Volume

3918

First Page

250

Last Page

254

ISBN

9783540332077

Identifier

10.1007/11731139_30

Publisher

Springer Verlag

City or Country

Singapore

Additional URL

http://dx.doi.org/10.1007/11731139_30

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