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Hosni Elwan
United Kingdom
1 Posts |
 Posted - 01/20/2024 : 08:21:15 AM
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Origin Ver.: OriginPro 2023b
Operating System: Windows 10 (64-bit)
Hi, I would like to fit the following formula with my experimental data:
y=R1*n*F*c*D*r*(R2+(R3*(R1*D*x/r)^−1/ 2))+(R4*exp(−R5*(R1*D*x/r)^−1/2))
Where:
n =4
F = 96485
r = 0.005
R1 = 4
R2 = 0.7854
R3 = 0.8862
R4 = 0.2146
R5 = 0.7823
Function model: Explicit
Function type: Labtalk Expression
Parameters: D
Independent variable: x
Dependant variable: y
Constans: n,F,c,r,R1,R2,R3,R4,R5
But when I click quick check, it shows "y = -- (Math cannot be performed on Text column: )"
What should I do? Please help me, thank you.
Hosni |
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Shirley_GZ
China
Posts |
Posted - 01/22/2024 : 02:40:08 AM
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Hi Hosni,
You have provided the value of constant "c", please share us the value, the sample project and the FDF file you prepared.
Thanks,
Shirley
Originlab Technical Service Team |
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Non-linear curve fitting