Informationain Gain in Matlab

Hello!

Attached is a formula for calculating information gain of a text file.

Can anyone please tell me that how can we find probabilities and log in matlab?

Is there any built-in function(s)?

Actually I have to transform attached formula in loop in matlab.

Thanks a lot

Answer 1

[Abin Jacob]

http://in.mathworks.com/matlabcentral/fileexchange/14996-entropy