How to measure any disturbance in a signal that is exceeding a threshold?
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Susan
il 19 Gen 2023
Commentato: Walter Roberson
il 24 Gen 2023
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
il 19 Gen 2023
Is that 0.12 an absolute value, or is it a relative value? If it is relative, what is it relative to?
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Walter Roberson
il 19 Gen 2023
wherebig = find(Yvf > 0.12);
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Walter Roberson
il 24 Gen 2023
[~,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
il 24 Gen 2023
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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