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 developing a relation from fitting points		  New Topic  Reply to Topic
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kmohamad

Canada
1 Posts
Posted - 02/17/2023 :  6:47:56 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Hi All

I need a little help with something.

I have a variable, let's call it y, and this variable is a function of 4 main parameters.

So I drew y against one of them, let's call it X1, and found that for all points, it satisfied this equation y = y0 + A*exp(R0*X1) at fixed X2, X3 and X4.

So if I change X2,X3,X4 the fits remain perfect but values of A,y0 and R0 changes completely

So how to get y0,A, and R0 function of X2,X3and X4? using origin software

Khaled Mohamad
Edited by - kmohamad on 02/17/2023 6:49:25 PM

yuki_wu

896 Posts
Posted - 02/20/2023 :  12:59:02 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi Khaled Mohamad,

I guess you want to perform nonlinear fit? If so, please take a look at this tutorial to get started:
https://www.originlab.com/doc/Tutorials/Fitting-NLFit-Basic

Regards, Yuki 
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