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 How to fit data using the new function		  New Topic  Reply to Topic
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Jing@email.sc.edu

USA
1 Posts
Posted - 10/26/2013 :  05:23:45 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Hi, my origin version is 8.0. I want to fit a curve using a new function that I edited. However every time when I try to do the curve fitting, the new function cannot be used. I don't know why.

Hao

snowli

USA
1386 Posts
Posted - 10/26/2013 :  11:51:04 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hello Hao,

When open Nonlinear Curve Fit dialog to fit the data, did you set Parameter initialization values?

Unless some parameter initialization code is defined in user-defined fitting function, you have to set the parameter initial values when doing the fit.

Maybe you can look at this video
http://www.originlab.com/Index.aspx?go=Support/VideoTutorials&pid=1172

About 2:45 shows how to set initial values on Parameters tab before doing the fit.

If it still doesn't work, maybe you can email your data and fdf file to tech@originlab.com and mention this post?

Sincerely, Snow
OriginLab Corp.
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