Code for shannon energy envelope?

hi guys

i have a pcg signal

and i want to using SHANNON ENERGY ENVELOPE for it

but i didnt find the code for it, in 'envelope' documentation there is only peak,rms and analytic function

is there any way to use the shannon energy envelope ?

thank you so much

Answer 1

[Star Strider]

Shannon energy is defined as , so use an anonymous function such as:

ShannonEnergy = @(x) x.^2 .* log(x.^2);

and then take the peak envelope.

That is what I would do.

[Mr noobys]

Hi thanks for the response :)

sorry can you explain it more detail to me?

how can i take the ShannonEnergy to the peak envelope?

this is the code for peak envelope right? how can i insert the ShannonEnergy?

envelope(data,10,'peak')

Thank you very much!

[Star Strider]

My pleasure.

Now that I have your data, this appears to be the best option:

ShannonEnergy = @(x) x.^2 .* log(x.^2);
D = load('matlab.mat');
data = D.data;
Fs = D.fs;
t = linspace(0, 1, numel(data))/Fs;
SEdata = ShannonEnergy(data - mean(data));
SEenv = envelope(-SEdata, 100, 'peak');

figure
plot(t, data, '-b')
hold on
% plot(t, SEdata, '-g')
plot(t, SEenv, '-r', 'LineWidth',1)
hold off

Experiment with the various parameters of the envelope function to get the result you want.

[Mr noobys]

Thank you so much !

thats solve my problem :D

[Star Strider]

As always, my pleasure!

[cedric Adomaya]

help me with matlab.mat in this code