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 what are the error parameters from fitting		  New Topic  Reply to Topic
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lupucelrau

France
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Posted - 09/20/2008 :  08:42:05 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Hi everybody

I have a very general question. I am using the Non-Linear Fitting Utility of Origin 7 to fit X-Y data sets. What is the exact meaning of the error parameters that are obtained as a result?

Thank you

Deanna

China
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Posted - 09/22/2008 :  02:19:39 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi lupucelrau,

I am not sure what you mean by "the error parameters". Would you please explain? Do you mean the "standard error of the parameters"?

Deanna
OriginLab Technical Services
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lupucelrau

France
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Posted - 09/22/2008 :  08:17:35 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi Deanna,

What I mean is the following:
I have a two columns worksheet, the first colimn being X and the second being Y. I make a graph and then use Analysis->Non-linear Curve fit->Advanced Fitting Tool. In the appearing window, after confirming data and choosing a function, I go to Action->Fit. There you have a list of parameters, their values, and then two columns: "Error" and "Dependency". What is the exact meaning of "Errors" and "Dependency"?

Thank you,
lupucelrau
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easwar

USA
1964 Posts
Posted - 09/22/2008 :  09:56:33 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi lupucelrau,

See this help section:
http://www.originlab.com/www/helponline/Origin8/en/regression_and_curve_fitting/the_fit_results.html

the above is from Origin 8 help, but the basic definition of these quantities is the same in all versions.

As for dependency, then you can find more information in sections such as:
http://www.originlab.com/www/helponline/Origin8/en/regression_and_curve_fitting/model_diagnosis_using_dependency_values.htm

Easwar
OriginLab
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