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 Gaussian/Laurent fit going in the -y axis		  New Topic  Reply to Topic
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worksff

1 Posts
Posted - 11/25/2015 :  05:46:35 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Ver. and Service Release: Origin 9.0.0
Operating System: Windows 7 64bit

Hello,

I'm trying to fit a curve with 2 laurent functions and use the combined areas (A1+A2) to calculate something. The problem is that the 2 laurent fits are going into the negative values of the y axis.

How do I make it so the laurent fits approach 0 as X goes to +- infinity, instead of going into the negative values of the y axis?
Edited by - worksff on 11/25/2015 05:48:31 AM

Hideo Fujii

USA
1582 Posts
Posted - 11/25/2015 :  1:44:41 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi Worksff,

In NLFit tool (if you use "Multiple Peak Fit" tool, you can press "Open NLFit" button in the "Get Points" box),
the Parameter tab in its upper panel, you can set (by double-clicking) the Value of the offset(=y0) parameter to 0,
and check "Fixed" check box to proceed the fitting. See:
http://www.originlab.com/doc/Origin-Help/NLFit-Dialog-ParaTab

--Hideo Fujii
OriginLab
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