Feature Selection for Web Page Classification

Literature Survey

Rudy Setiono and Huan Liu (1997) proposed that Discretization can turn numeric attributes into discrete ones. χ² is a simple algorithm. Principal Component Analysis-compose a small number of new features. It is improved from simple methods such as equi-width and equal frequency intervals. For each and every attributes calculate the χ² value for each and every interval. Combine the lowest interval values while approximation.

Shounak Roychowdhury (2001) proposed a technique called granular computing for processing and expressing chunks of information called granules. It reduces hypothesis search space, to reduce storage. Fuzzy set based feature elimination techniques in which subset generation and subset evaluation are employed. For optimal feature selection brute force technique is employed.

Catherine Blake and Wander Pratt (2001) suggested the relationship between the features used to represent the text and the quality model. A comparison of association rules based on three different concepts: words, manually assigned keywords, automatically assigned concepts are made. Bidirectional association rules on concepts or keywords are useful than the words used. Each individual feature should be informative. The quality of features should be meaningful. The concepts and keywords also represent fewer 90% of the words used in the medical diagnosis.