- Open the Curve Fitter app and import your data.
- In the "Equation Settings" section, select "Custom Equation".
- Enter the modified expression in the "Equation" field: A*(d^n)*exp(B*X) + C*X.
- In the "Coefficients" section,the four coefficient will automatically reflect. If not, then you can add them mannually.
- In the "Coefficient Starting Values" section, enter initial guesses for the four constants.
- Since 'd' is a known constant, you can set the start, upper and lower limit as same values.
Inserting a constant value in custom expression of Curve Fitting app.
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Expression: Y = A*(d^n)*exp(B*X)+ C*X;
Here, X = Independent Variable Vector
Y = Dependent Variable Vector
A,B,C,n = Constants for fitting
d = distance value (Known)
I want to use the known d value but donot know how to use in curve fitting app ?
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Answers (1)
Ashu
on 23 Feb 2023
Edited: Ashu
on 23 Feb 2023
To use your expression in the Curve Fitter app, you can follow these steps:
By fixing the value of d as a constant, the curve fitting app will estimate the values of A, B, C, and n that best fit the data while keeping d fixed at its known value.
To know more about the interactive curve and surface fitting, you can refer to the following documentation
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