calculate a secondary peak to peak amplitude after the first peak to peak amplitude in matlab

main.m
% Generate example signal
signal = [1 -2 3 -4 5 -6 7 -8 9 -10];

% Calculate first peak-to-peak amplitude
pp1 = max(signal) - min(signal);

% Find index of the first peak
[~, max_index] = max(signal);

% Calculate secondary peak-to-peak amplitude by finding the minimum and
% maximum values in the section of the signal following the first peak
pp2 = max(signal(max_index+1:end)) - min(signal(max_index+1:end));
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