how to find all points after falling edge

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Sue MM 2019-5-7

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https://ww2.mathworks.cn/matlabcentral/answers/460769-how-to-find-all-points-after-falling-edge

评论： dpb 2019-5-7

Hi,

I have a signal that I am trying to analyze. I want to find all the points after the falling edge and average those points to find the 'average minimum' of that signal. I tried using findpeaks and the find command but not much success there. Any help would be much appreciated, thank you!

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Sue MM 2019-5-7

1lbs_2.csv

Hi, I attached the file below. Column 1 is time, volumn 2 is voltage. When plotted, the voltage is almost like a square wave. I want to find the average of all minimum points thats what I mean by points after the falling edge. Finding the minimum would might not be right in this scenario as there could be some outliers.

dpb 2019-5-7

I'd suggest starting with the documentation for findpeaks example looking at a clipped signal that roughly matches what a square wave/your signal does and see if something as simple as that will give you levels against which to set threshold values.

Remember, of course, that a minimum is just the negative of a peak (and vice versa)...

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