search

cjlin1 / liblinear

LIBLINEAR -- A Library for Large Linear Classification
https://www.csie.ntu.edu.tw/~cjlin/liblinear/
BSD 3-Clause "New" or "Revised" License
1k stars 343 forks source link

Effect of normalization #19

Open sabu3 opened 8 years ago

sabu3 commented 8 years ago

When I use L1R_LR, a discrimination ratio changes depending on a normalization method. I tried two normalization method.

  1. Centering(Subtract average from each data) Quick implementation, but discrimination ratio is below.
  2. Normalize data with N(0,1). Long implementation, but discrimination ratio is higher than 1.

I read the program, but I did not find a reason.

simsong commented 6 years ago

This issue was moved to angleto/liblinear#16