How to convert an optimization variable to symbolic variable?

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.

Answer 1

[Walter Roberson]

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 = 

[B. Berk]

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.

Answer 2

[Matt J]

You can use the evaluate() command to substitute in values.

[Walter Roberson]

However you can only evaluate at double, not at symbolic locations.