use Findpeak for multiple ECG signals

hey ! I am trying to use "findpeaks' for multiple ecg signals using loop.

but it does not work. I know the problem , in my file there are 30 ecg signals and every signal may have different peaks , Therefore, it is not generating a matrix having equal columns.

ecg_m has 30x 10149 rows n columns. My code is given as:

for i=1:30

[pks(i,:),locs(i,:)] = findpeaks(ecg_m(i,:));

end

Please tell me any other way to do this task.

[Mario Malic]

Use structure, or cell array to save the data in.