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Creating NL fitting function

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Gerard2007

Iran
1 Posts

Posted - 07/07/2017 : 6:29:08 PM

Hi,

I have data in 2 columns:
col(V) = (x-axis)
col(F_L) = (y-axis)

I would like to fit my data with the equation in the attached image.

I tried to create my own fitting function (Going to tools>Fitting Function Builder) however, the problem is that to create a function, the function body has to have only the dependent variable y (in my case F_L) on the left-hand side of "=". I will be glad to hear your comments on how I can create this fitting function.

Soma more info:
Independent variable: V
Dependent variable: F_L
parameters: F_0 and B
Constants: F_* and K_B and K_series and T

Edited by - Gerard2007 on 07/07/2017 6:51:53 PM

JacquelineHe

287 Posts

Posted - 07/10/2017 : 04:26:35 AM

Hi,

I suggest you can try to define an implicit function.

Please refer to this help pages and video tutorial:
http://www.originlab.com/doc/Quick-Help/Implicit-Function
http://www.originlab.com/doc/Origin-Help/Fitting-Implicit
http://originlab.com/doc/Tutorials/ImplicitFit-3Var
http://www.originlab.com/doc/Origin-Help/Fitting-Implicit

Also, I suggest you can change the variable, parameters and constants to a simple characters. Because I do not confirm " F_*" this kind expression of the Constants could be used in the Fitting Function.

Thanks
Jacqueline
OriginLab

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