How to store the [pks,locs] into a matrix, from a looping?

Hi all, I'm trying to find natural frequencies, from some FRF's I have.

I already extracted the absolute values of the FRF's (they were in imaginary and real numbers), and I have ploted some graphs, with the frequency vector on the x axis.

Here are the data:

absolutevalues(800x270) - 270 points measured with 800 samples.

Fv = linspace(0,8,size(absolutevalues,1))*1000 ---- the frequency sample is 8000Hz

Trying to find the natural frequencies (peaks) I did this (for only 40 peaks):

peakValues = zeros(40,270);

for m = 1: size(absolutevalues,2)

pks(40,m) = findpeaks(absolutevalues(:,m), Fv, 'NPeaks', 40);

peakValues(:, m) = pks (40,m);

end

The problem is: it only gives me back the peak values for the last value of m (270). How can I store them in this peakValues matrix I created?

Thank you in advance!

Answer 1

[Abhishek Gupta]

Hi,

Referring to the following MATLAB Answers, which might help you in resolving the issue: -

1. https://www.mathworks.com/matlabcentral/answers/691870-i-want-to-put-n-and-counter-in-one-matrix#answer_575690?s_tid=prof_contriblnk
2. https://www.mathworks.com/matlabcentral/answers/294342-how-do-you-append-to-a-matrix-within-a-for-loop