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Winkie_Bear

United Kingdom
1 Posts
Posted - 10/27/2017 :  1:22:31 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
I'm using Origin to carry out non-linear fitting of an integral function; however, the fitted curve has segments that are offset alternately above and below the observed data, typically not by very much and apparently the segments are of random length. The offsets are real because the reported residuals match the segments. Clearly, the fit is not accurate.

Can anyone advise why this might be occurring and how to fix it. I'm happy to send the file if necessary.

arstern

USA
237 Posts
Posted - 10/27/2017 :  4:01:20 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,

Yes please send your file with the the fitfuncion file at tech@originlab.com. Please provide information like the equation, constants, and parameters.

Thanks,
Aviel
OriginLab
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