How can we get the surrogate function after the optimisation?

Hello, I would like to know if it is possible to have the surrogate function obtained after an optimisation process. Indeed, after an optimisation with the surrogate tool, we obtain certain figures for the design variables but I also want the surrogate model. How can I get it ? Thanks

Answer 1

[Alan Weiss]

The surrogate model is not available, sorry. Indeed, its quality as a surrogate is unknown, and may be poor.

Can you please say why you would like to get the surrogate model?

Alan Weiss

MATLAB mathematical toolbox documentation

[Matthieu Bernard]

Okay thanks for the respone. I wanted the surrogate model to understand how this one search in the domain. Indeed, if I had the surrogate function i could plot and visualize it.

[Matthieu Bernard]

Just, what are the reasons why the surrogate model is not available?

[Alan Weiss]

Well, it is intended to help find an optimum, but not necessarily to be a true surrogate globally. There are no guarantees for its quality. That said, you are free to create an RBF model based on the evaluated points; you can obtain the evaluated points and their values in the trials output using the syntax

[x,fval,exitflag,output,trials] = surrogateopt(___)

Alan Weiss

MATLAB mathematical toolbox documentation