# entropy of a signal

393 views (last 30 days)
siddhartha chandel on 27 Jun 2012
Hello every body . Please give me command for entropy calculation of a signal. How we can calculate using wentropy function in wavelet? Thanks in advance .
##### 2 CommentsShowHide 1 older comment
mamta p on 21 May 2020
Edited: mamta p on 21 May 2020
thank you Divya Pawar mam.

maria on 25 Sep 2012
Hi! For find the value of entropy for a signal 1-dimensional, can use:
p = hist(signal length);
entropy = -sum(p.*log2(p));

dany katamba mpoyi on 4 May 2022
I = randn(10000000,1);
p = hist(I,1000000);
% remove zero entries in p
p(p==0) = [];
% normalize p so that sum(p) is one.
p = p ./ numel(I);
Eg = -sum(p.*log(p));
I = randn(10000000,1);
p = hist(I,1000000);
% remove zero entries in p
p(p==0) = [];
% normalize p so that sum(p) is one.
p = p ./ numel(I);
Et = -sum(p.*log(p));
negE=Et-Eg

### Categories

Find more on Descriptive Statistics in Help Center and File Exchange

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!