how to find FWHM in histogram

how can I evaluate the FWHM in a histogram with 2 peaks or more? I couldn'f find a built-in function...

thanks!

[Rik]

Since there isn't a builtin function, you will have to write one yourself.

I would suggest starting with finding the peak.

[sani]

Thenks, yes it will make it much easier

Answer 1

[Image Analyst]

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.