Compute the average of pwelch

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Tu Nguyen
Tu Nguyen on 6 Apr 2022
Edited: Tala on 6 Apr 2022
Hi all
I have eeg signal with 129 samples,
I computed each signal, now I need to take the average of all 129 samples and plot that average. How can I do that?
Please help me.
I reeally appreciate that
clc;
close all;
clear;
load('eeg_Fs250Hz.mat');
[row columm] = size(eeg);
for i = 1:columm
[ppx{i}, f{i}] = pwelch(eeg(:,i),200,100,200,Fs);
figure(1);
plot(ppx{i});
hold on
end

Answers (1)

Tala
Tala on 6 Apr 2022
not sure what the avarage of pwelch means! maybe avarage energy of your signal? there are better ways to do so...anyways...you could just this after your hold on command.
plot(mean(ppx{i}));
I would add f{i} as well in my plots. meaning plot(f{i}, ppx{i}) to see the frequencies on your plot
  6 Comments
Tala
Tala on 6 Apr 2022
Edited: Tala on 6 Apr 2022
my pleasure

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