MATLAB: How to find valley amplitude position of individual signals

feature extractionpeak detection

hey guys, In the given picture(consider only the upper subplot), is it possible to find the position of maximum negative peak for every signal out there? please help me asap!

Best Answer

I would use the findpeaks function on the negative of each signal. So the negative peaks would be:
[pks,locidx] = findpeaks(-signal); % Peaks & Peak Indices In Vector
pks = -pks; % Correct Amplitudes Of Peaks