Improved Feature-Selection Method Considering the Imbalance Problem in Text Categorization

Figure 2

The accuracy curves of SVM based on nine pairs of feature-selection methods on 20-Newsgroups, respectively.

(a) IG

(b) CHI

(c) MI

(d) DF

(e) GINI

(f) DIA

(g) CMFS

(h) OCFS

(i) DFPFS