How to detect peaks above a certain threshold in matlab
44 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
How to detect peaks above a threshold in a signal and store their locations.
I wrote a code:
[Pks,locs]=findpeaks(x,1000,'Threshold',5);
But i didnt get any result..is there any other way?..kindly help me with matlab code.
0 Kommentare
Antworten (3)
Image Analyst
am 20 Nov. 2016
If MinPeakHeight doesn't work, then you can always threshold your original signal to set values below the threshold to the min.
minValue = min(yourSignal);
yourSignal(yourSignal < threshold) = minValue;
then call findpeaks.
1 Kommentar
Walter Roberson
am 20 Nov. 2016
You want MinPeakHeight rather than Threshold.
1 Kommentar
Image Analyst
am 20 Nov. 2016
Does MinPeakHeight filter based on the peak height above the peak base, or based on absolute signal values? The documentation is not clear to me. It says "Minimum peak height, specified as the comma-separated pair consisting of 'MinPeakHeight' and a real scalar. Use this argument to have findpeaks return only those peaks higher than 'MinPeakHeight'." But it's not clear that "higher" means to them.
sohab azhar
am 11 Aug. 2019
i have converted a colour video into histogram now i have to get the number of highest peaks in histogram how can i do it?
4 Kommentare
sohab azhar
am 24 Aug. 2019
yes i have used findpeaks() but it is not working , actually i want to apply threshold and get number of peaks above that threshold.
Image Analyst
am 25 Aug. 2019
You either do not have the Signal Processing Toolbox installed, or you're not applying the best set of input parameters to findpeaks(). That's about all we can say since you have not shared your signal, your code, or your error message. "It is not working" is, as I'm sure you can imagine, about as useless and unhelpful description of the problem that is possible. What are we supposed to do with that? I guess, just refer you to this link
Siehe auch
Produkte
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!