Compute the average of pwelch

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Tu Nguyen
Tu Nguyen 2022-4-6
编辑： Tala 2022-4-6
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

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回答（1 个）

Tala
Tala 2022-4-6
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
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Tu Nguyen
Tu Nguyen 2022-4-6
I got it. Appreciate you a lot
Tala
Tala 2022-4-6
编辑：Tala 2022-4-6
my pleasure

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