MATLAB Answers

how to find FWHM in histogram

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sani on 28 May 2020
Answered: Image Analyst on 29 May 2020
how can I evaluate the FWHM in a histogram with 2 peaks or more? I couldn'f find a built-in function...


Rik on 28 May 2020
Since there isn't a builtin function, you will have to write one yourself.
I would suggest starting with finding the peak.
sani on 28 May 2020
Thenks, yes it will make it much easier

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Accepted Answer

Image Analyst
Image Analyst on 29 May 2020
Try this (untested):
counts = histcounts(data);
maxCounts = max(counts);
leftBin = find(counts > maxCounts/2, 1, 'first')
rightBin = find(counts > maxCounts/2, 1, 'last')
fwhm = rightBin - leftBin; % Add 1 if you want, depending on how you define width.


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