surrogateopt: get handle of optimized surrogate function

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Dear community
Currently, I'm using surrogateopt from the global optimization toolbox to minimize a computationally expensive objective function (using third party computer code). I'm wondering, is it possible to get a function handle of the optimized surrogate function or at least the functional form and corresponding coefficients? I've checked the manual and the only thing, which I've found are the functional values at the evaluated points but not the function itself. In one of the help pages in the manual, it's mentioned that the surrogate is a radial basis function. If one can't obtain the surrogate function handle, could one retrieve the coefficients of the surrogate somehow?
Thank you so much for your help

Accepted Answer

Alan Weiss
Alan Weiss on 23 Aug 2021
Edited: Alan Weiss on 23 Aug 2021
Sorry, the surrogate is not returned and is not available. We have no idea whether the surrogate is a good approximation to the objective function or not, and so we decided not to return a potentially misleading surrogate.
You are not the first to request this functionality. See this answer.
Alan Weiss
MATLAB mathematical toolbox documentation
Tobias Held
Tobias Held on 19 Mar 2022
I certainly think it would be beneficial to be able to visualize how the surrogate changes with each iteration. Of course, the number of dimensions must be feasible.

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