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rolg

United Kingdom
1 Posts
Posted - 11/12/2015 :  11:11:39 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Ver. and Service Release (Select Help-->About Origin):9
Operating System:windows 7

Hello,
Pls I'm trying to do a non-linear regression to obtain the parameters C and D in the expression below:

y = C(1 - erf(x/sqrt(D*31104000))).

It keeps bringing the message: Fit did not converge. Please what should I do?

O.R.Ogirigbo

Echo_Chu

China
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Posted - 11/13/2015 :  03:47:10 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,

Please look at the quick help below for some possible reasons that the fit can be converge

http://www.originlab.com/doc/Quick-Help/BadFitResult-Solution

Echo
OriginLab Corp
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