Fitting data to a known function using numerical solution

I have a set of input values and output values of a function f(x).

Now,

zz= linspace(1,120e3, 1000);

A= 100.*exp((-alpha).*(1 : zz/2)) + gg.*exp(ff.*(zz/2 : L))

where, alpha is a known value. I need to find gg and ff values to fit the A to the output values of f(x).

I am confused how to to do this. Your suggestions would be highly appreciated. Thanks.

Answer 1

[Davide Masiello]

I suggest an extensive reading of the following documentation

https://ch.mathworks.com/help/curvefit/fit.html

https://ch.mathworks.com/help/curvefit/fittype.html

https://ch.mathworks.com/help/curvefit/fitoptions.html

These are the Matlab function and options for curve and surface fitting.