How to convert an optimization variable to symbolic variable?

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B. Berk 2022-8-9

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评论： B. Berk 2022-8-9

Hi everyone,

I need to convert an optimization variable that created by 'optimvar' command to a symbolic variable. I couldn't find any converter funtion for this one. I have a polynom consists of optimization variables, and i want to replace found values of some optimization variables in this polynom. If you know any other method for doing this, please let me know.

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Answer 1

Walter Roberson 2022-8-9

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It does not appear to be documented, but use optimexpr2fcn() on the optimization expression, to get back a function handle to a .m that it will write in your current directory. The resulting function will expect only a single input that is a vector, all of the inputs concatenated together.

For example,

x = optimvar('x',3,2);

y = optimvar('y',1,2);

expr = sum(x,1) - 2*y;

syms X [3 2]

syms Y [1 2]

h = optimexpr2fcn(expr)

h = function_handle with value:

@exprfcn

h([X(:); Y(:)])

ans =

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B. Berk 2022-8-9

I did a lot of research, however, couldn't see this optimexpr2fcn function. Looks like it wil solve my problem. If I can't solve it, I'll write here again if you don't mind.

Sincerely thanks.

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