Can anyone help me in curve fitting problem of Magic Formula?

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Akshay Apte
Akshay Apte 2017-3-20
编辑： Marco Furlan 2017-7-11
I have a set of 25 values of x and y and this predefined equation. I have to fit the values in this and find the coefficients
f (x)= D.sin[C tg-1{(1- E).B.x + E.tg-1(B.x)}]              tg-1 = inverse tg function
I have to write a MATLAB algorithm to find the optimum fit for the data shown above and find the parameters B, C, D, and E. I even have to plot the curve
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Torsten
Torsten 2017-3-21
https://en.wikipedia.org/wiki/Hans_B._Pacejka
Best wishes
Torsten.

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回答（2 个）

Walter Roberson
Walter Roberson 2017-3-21
I suggest that you use cftool to create a custom model
Marco Furlan
Marco Furlan 2017-7-11
编辑：Marco Furlan 2017-7-11
Another approach can be to use lsqcurvefit
Link here

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