FISA: Feature-based Instance Selection for Imbalanced Text Classification
Conference Proceeding Article
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.
Vector support machine, Statistical analysis, Electronic discussion group, Classification, Natural language, Text, Information retrieval, Content analysis, Data analysis, Knowledge discovery, Data mining
Databases and Information Systems | Numerical Analysis and Scientific Computing
Data Management and Analytics
Advances in Knowledge Discovery and Data Mining: 10th Pacific-Asia Conference, PAKDD 2006, Singapore, April 9-12: Proceedings
City or Country
SUN, Aixin; LIM, Ee Peng; Benatallah, Boualem; and Hassan, Mahbub.
FISA: Feature-based Instance Selection for Imbalanced Text Classification. (2006). Advances in Knowledge Discovery and Data Mining: 10th Pacific-Asia Conference, PAKDD 2006, Singapore, April 9-12: Proceedings. 3918, 250-254. Research Collection School Of Information Systems.
Available at: http://ink.library.smu.edu.sg/sis_research/894