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  • Last update: 5 years ago
  • Total downloads: 57
  • Operating system: Linux, Mac OS X, Win All, BSD, Solaris
  • Publisher: ming
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scripts default iconchi square feature analysis (Scripts) Publisher's description

parameter 1 is feature value (discrete), parameter 2 is the corresponding labels

parameter 1 is feature value (discrete), parameter 2 is the corresponding labels

the reference paper is: S. Wu, P. A. Flach, Feature selection with labeled and unlabeled data, available at

relevant paper is: Technical Note: Bias in Information-Based Measures in Decision Tree Induction.

I programmed the file according to the first paper, but I find that the results are not reasonable, wondering if it is the drawback of chi square feature analysis method or some bugs in my file. Hope somebody can point out.

The computed chi value needs to compared with chi square table to see how important are the features.
chi square table:

System Requirements:

MATLAB 7.8 (R2009a)
Program Release Status: New Release
Program Install Support: Install and Uninstall

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