correlation window range code

z1=xcorr(GA2L5E1(:,4),10000);
plot(z1)

I got the correlation of the vibration data, and I found this signal, now I have to subtract the window pitch, and the window pitch is 420 421 as seen.

and here is code which is i tried to find window range

for i=1:10000;
    [M,I(i)]=max(z1(i:i+420));
    I(i)=I(i)+i;
    for i=1:25;
        [N,X(i)]= max(I(i+400-399:i+400));
        i=i+1;
    end
end

[Yusuf TULUNAY]

how can I find this range i can't find the right code

can anyone help me?

[dpb]

Sorry, I don't understand what "window pitch" means to you??? The 420/421 looks to be the spacing (points/frequency/???) between peaks that appear may be an envelope.

What is "range" in the follow-on comment? The peaks you've labelled above?

Have you investigated

doc findpeaks

in Signal Processing Toolbox? It has many input options that may be tweaked for such purposes.

[Yusuf TULUNAY]

I do not need peaks of the signal actually window pitch means x distances between peaks. The signal itself repeats every 420 range so I need the code that gives me what that value is without looking the signal. I hope I could tell what I need.

[dpb]

As noted, that's something should be able to do with findpeaks

Not much anybody here can do except suggest w/o a sample data file to work with...

[Yusuf TULUNAY]

okey thank you

Answer 1

[Asvin Kumar]

Check out the findpeak function as mentioned in the comments above.

You can use multiple Name-Value pairs to suit your use case. For example, you can set the minimum separation between peaks, set a minimum or threshold for peak height etc. Have a look at examples here: https://www.mathworks.com/help/signal/ref/findpeaks.html#bufhyo1-2