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 developing a relation from fitting points

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T O P I C    R E V I E W
kmohamad Posted - 02/17/2023 : 6:47:56 PM
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
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yuki_wu Posted - 02/20/2023 : 12:59:02 AM
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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