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Code covered by the BSD License

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4.8 | 13 ratings Rate this file 158 Downloads (last 30 days) File Size: 1.49 KB File ID: #10590

fwhm

31 Mar 2006 (Updated 05 Apr 2006)

To calculate the full-width at half-maximum of an input.

File Information

Description

width = fwhm(x,y)

Full-Width at Half-Maximum (FWHM) of the waveform y(x) and its polarity.

The FWHM result in 'width' will be in units of 'x'

The code was developed by an unknown author.

MATLAB release

MATLAB 6.5 (R13)

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Everyone's Tags	dsp(3), fullwidth at halfmaximum(9)
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Comments and Ratings (14)
20 Apr 2006	zm o	This file's suitable to use for experimental datas.
17 Jan 2007	Igor K	great job!
18 Jan 2007	Sue S	Very easy to use!
19 May 2007	Rajiv Bharadwaj	Great Job !
28 May 2007	Ketki V	Fantastic! Im so glad I found this!
12 Oct 2007	bioguider bioguider	easy to use
06 Nov 2007	John Smith	Superb
18 Aug 2008	Nathir Rawashdeh	It does not work for noisy y(x). It keeps saying the peak is an impulse.
06 May 2010	Brian	Need to add y=y-min(x) at beginning to find fwhm of data not going to zero
05 Feb 2011	Amr Sadek	very easy to use, thank you
27 Feb 2011	Tom Phillips	Thanks
01 Apr 2011	Donald	Simple and easy to read. I modified it to search for the falling edge from the end of the array instead of from the peak because my pulses have high overshoot at the rising/falling edges.
23 Nov 2011	Robert
07 Apr 2012	Nicolas	Brilliant, saved me a lot of time!

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Updates

03 Apr 2006

1) Remove line:
[c_max,k_index] = max(y);

2) Replaced two two "if-end" conditions by "if-else-end" condition

3) The output argument "c" was never returned, hence it has been removed.

03 Apr 2006

1) Remove line:
[c_max,k_index] = max(y);

2) Replaced two two "if-end" conditions by "if-else-end" condition

3) The output argument "c" was never returned, hence it has been removed.

05 Apr 2006

No need to reassign variables 'x' and 'y'.

Remove last 'else' condition.