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hscheer
Germany
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 Posted - 08/01/2013 : 05:05:53 AM
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Origin Ver. and Service Release (Select Help-->About Origin): 7.5
Operating System: Win XP ProXP
After a crash, I have lost several functions I had generated including a Gaussian component analysis that I used for decconvoluting absorption spectra. Since I am not a heavy origin user, I wonder if there is a collection of custom functions available somewhere, or if somebody could supply me with such a funtion. |
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hscheer
Germany
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Posted - 08/01/2013 : 11:03:55 AM
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quote:
Originally posted by Christyli
Hi,
If the lost functions are customized curve fitting functions, you can find them in the User File Folder. If you cannot remember the path, you can click Window: Script Window in the menu, then type the script:
%Y=;
Highlight the script and press 'Enter'. A path for this user file folder will appear. All customized fitting function will be placed in the "FitFunc" folder under the user file folder.
If this is not you want, could you please tell me more detail about what is the "function" you losted.
Christy
Originlab
Thanks for the quick reply. I did not find the function, but have now written a new function that is the sum of four Gaussians (center mi, amplitude Ai, width wi, plus a baseline offset y0:
y=y0 + (A1/(w1*sqrt(PI/2)))*exp(-2*((x-m1)/w1)^2) + y0 + (A2/(w2*sqrt(PI/2)))*exp(-2*((x-m2)/w2)^2) + y0 + (A3/(w3*sqrt(PI/2)))*exp(-2*((x-m3)/w3)^2) + y0 + (A4/(w4*sqrt(PI/2)))*exp(-2*((x-m4)/w4)^2)
It seems to work reasonably well with my dataset. I wonder if there exists in your collection a routine that does not only plot the fit function, but also the Gaussian components. Also, Gaussians are not always good, sometimes Voigt or even Lorentz do better.
Sincerely,
Hugo |
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hscheer
Germany
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Posted - 08/14/2013 : 4:54:01 PM
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Dear Christyli,
thanks! I was interested in the first alternative and it worked nicely plotting the four Gaussians separately from the fit data table.
Best,
Hugo |
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Spectra deconvolution