How to measure any disturbance in a signal that is exceeding a threshold?

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Susan
Susan 2023-1-19
评论： Walter Roberson 2023-1-24
Hi,
Assuming having a noisy signal as attached, I'm interested in measuring any disturbance that exceeds a threshold, i.e., 0.12. How can I do that?
Thanks in advance!

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Walter Roberson
Walter Roberson 2023-1-19
wherebig = find(Yvf > 0.12);
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Walter Roberson
Walter Roberson 2023-1-24
[~,LOCS] = findpeaks(Yvf, 'MinPeakHeight', 0.12);
Note that the find() done earlier would locate all of the entries in Yvf > 0.12, whereas findpeaks() with this option would look for locally high points
Walter Roberson
Walter Roberson 2023-1-24
Which one you would use (or which options for findpeaks()) would depend on whether you need to know the immediate start of the disturbance crossing a threshold, or if you want instead to know where the peak of the disturbance was.

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