Code covered by the BSD License

4.0

4.0 | 4 ratings Rate this file 121 Downloads (last 30 days) File Size: 2.15 KB File ID: #35122

Gaussian fit

16 Feb 2012 (Updated 23 Feb 2012)

Fits Gaussian curve into points. The curve is understood as a probability density function, pdf.

File Information
Description	The function fits Guassian probability density function into a set of points. Standard deviation and mean are returned.
Required Products	MATLAB
MATLAB release	MATLAB 7.5 (R2007b)

Tags for This File
Everyone's Tags	gauss fit, gauss interpolation, gaussian fit(2), guassian interpolation(2), normal fit, pdf fit(2), pdf gauss fit
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Comments and Ratings (6)
24 Oct 2012	sr	My data has a constant (with some spread) y-offset. Please let me know what to do in your code to make it fit? Thanks
24 Oct 2012	sr	My data has a constant (with some spread) y-offset. Please let me know what to do in your code to make it fit? Thanks
29 Mar 2012	Eddie
23 Feb 2012	Thijs	Updating my previous comment for future readers. The problem was indeed incorrectly scaled data. The function works quite beautifully now.
22 Feb 2012	Przemyslaw Baranski	Hi Thijs. Is your data properly scaled? I mean a probability density function should sum up to 1 and so should roughly the histogram for which your try to fit the curve
22 Feb 2012	Thijs	I changed the line 88 from exit to return. The function works rather poorly on my data though, I get better results minimizing the logarithmic residuals.

Updates
19 Feb 2012	More description, so that it can perhaps be easier found
23 Feb 2012	Normalization of data. Added some infos to the helpd section
23 Feb 2012	Checking if the input points (x,y) are sorted. If not sort them. Improved checking if p.d.f sums up to 1