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Questions on the use of Mathematica to construct models for approximating empirical data.
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Fitting on Diffraction Pattern, NonlinearModelFit, Complex Infinity
I'm trying to fit the function
$f(x;a,b,s)=a\left( \frac{\sin\left(b \sin(s x) \right)}{b \sin(s x)} \right)^2 $
on the data below using NonlinearModelFit but I'm getting an error message: Indetermina …