How to optimize two variable simultaneously in a function?

2018 3 22
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更新时间：2018 3 22
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Following is the function that I want to optimize for two variable theta1_t and theta2_t. There are no constraints so I tried using the fminunc(), but it gives me an error. atk= exp(-theta2_t*k);
btk= (theta1_t/(theta1_t-theta2_t))*(exp(-theta2_t*k)- exp(-theta1_t*k));
func= (atk*y0)+(btk'*u)+gamma where gamma is known.
I have 165 values of theta1_t and theta2_t. I want to choose the optimum one of them. How can I do this? k ranges from 1 to 165.

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Alan Weiss
Alan Weiss 2018-3-22

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Are you doing curve fitting? I mean, you have a lot of data and you are trying to find the best parameters of an equation that fits the data? If so, see this example. If not, then I don't understand your question, so please explain a bit more, and maybe show some code or at least the complete MATLAB error message.
Alan Weiss
MATLAB mathematical toolbox documentation

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