Is it possible to combine fminmax and nonlinear curvefitting together to obtain the parameters

I'm attempting to perform complex fitting. I've tried numerous approaches without success. In the literature I've read, fminimax with least squares has been used. So I'd appreciate any advice on how to combine the two.

Answer 1

[Indra]

You can use either lsqonline or lsqcurvefit to perform non-linear fitting of complex data.

Refer to the following documentation Fit a Model to Complex-Valued Data - MATLAB & Simulink (mathworks.com)