Improved approach to CHI in feature extraction
Yufang Zhang · Journal of Computer Applications · 2008
Feature extraction technology is an essential part of text categorization,which directly affects the categorization precision.This paper comprehensively took frequency,distribution and concentration into account and proposed an improved Chi-square Statistic(CHI)approach.In order to verify the improved CHI approach,a contrastive experiment was carried out.The experimental results show that improved CHI approach is superior to traditional CHI approach in feature selection,which verifies the efficiency and probability of the improved CHI approach.