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How I can minimize an objective function having five variables (one vector and four parameters)?

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Jorge HV
Jorge HV on 18 Feb 2016
Commented: Walter Roberson on 18 Feb 2016
Dear all
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

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Walter Roberson
Walter Roberson on 18 Feb 2016
You are asking to minimize a vector. What does that mean?
Did you want to minimize the sum of squares of the values?

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