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OriginALL

Italy
2 Posts
Posted - 04/27/2012 :  2:01:59 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Ver. and Service Release (Select Help-->About Origin): OriginPro 8 SR2
Operating System:Windows Seven x64 Home Premium

Hi all! I've an apparent problem with curve fitting in Origin.After launching "Fit multiple peaks", I obtain the datasheet of FittedCurves. Now, why the "Sum Y" coloumn isn't equal to the sum of Peak1(Y) and Peak2(Y) and Peak3(Y)? How i can obtain this SumY?

.

Thanks in advanced

Hideo Fujii

USA
1582 Posts
Posted - 04/27/2012 :  3:00:35 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi OriginALL,

The each peak fit curve, and their sum contain the bias (i.e. offset) term, which must be reported as "y0" in the fit report. So, Once y0 are subtracted from them, summation should match.

--Hideo Fujii
OriginLab

P.S. Your y0 should be around -0.16339 .
Edited by - Hideo Fujii on 04/27/2012 3:36:45 PM
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OriginALL

Italy
2 Posts
Posted - 04/28/2012 :  10:56:45 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Very thanks Hideo Fujii for your answer.
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