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T O P I C R E V I E W
Loksley	Posted - 03/12/2009 : 2:18:51 PM Origin Ver.: OriginPro 8 Sr4 Operating System:Xp Sp2 Hi everybody! I need to perform some NLFit on many datasets (4 peaks per column and about 100 columns) and plot the evolution of the NLFit parameters. To build my script (LabTalk environment), I inspired myself from the following script example: quote: // Start a fitting session for col(A),col(B) using Gauss function and my named tree nlbegin iy:=(1,2) func:=gauss nltree:=MyTree; // Set the peak center as 5 and fixed MyTree.xc = 5; MyTree.f_xc = 1; // Set the baseline as 0 and fixed MyTree.y0 = 0; MyTree.f_y0 = 1; // Now fit nlfit; // and report results type Baseline y0 is $(mytree.y0), Peak Center is $(mytree.xc), Width is $(mytree.w), Area is $(mytree.A); $(mytree.y0) will return the fitted y0 value, but what about the associated error? Where can we find the substitution variable for the errors? Thank you for your help.
2 L A T E S T R E P L I E S (Newest First)
Loksley	Posted - 03/13/2009 : 05:15:40 AM Many thanks Shirley, I'll try that.
Shirley_GZ	Posted - 03/13/2009 : 02:35:38 AM Hi Loksley, Please see this wiki page: http://wiki.originlab.com/~originla/wiki2/index.php?title=X-Function:Nlbegin#Description $(mytree.e_y0) will return the error value of y0. Thanks, Shirley Originlab Technical Service Team

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