I want minimize an objective function of following type:
fun = (@ (???)) (A*x - b)^2 + a*(exp(-b*z) - c*exp(-d*z))
where x is a vector (initial guess suposse zeros(29,1)), while a,b,c,d are parameters (initial guess suposse a =1 b = 2 c = 3 d = 4)--> I need find this 4 values and vector x.
A(matrix), b(vector) and z (vector) are given.
All my best