MATLAB for signal analysis. This is my code to find the peak R, Q , S. Now I need to find the P point and T point, like the picture. Please tell me the code to find P and T. Any help would be appreciated. Thanks.

[dpb]

The large trace looks nothing like the figure in 2. unless it's a region around a single peak grossly expanded?

HINT: A minimum is just the maximum of a negated signal. FINDPEAKS works for that, too...