Symbolic or function handle to numeric

Is there a way to turn a symbolic expression or function handle into a numeric expression? For example, say i have:

syms x
y=x^2;

and would like to turn it into to this

y=x^2;

Where x is no longer a symbolic variable such that when I give x a value like

 x=[1 2 3];

and I type

    y

I get

y=[1 4 9];

I know function handles will do this but matlab coder can not take function handles, so is there a way to do this?

Thanks

Drew

Answer 1

[Azzi Abdelmalek]

syms x;
y=x^2;
out=subs(y,[1 2 3])

[Drew Mitchell]

Thanks, I might not have been clear enough:

Im not actually interested in the output, I am interested in making the string 'y=x^2' become y=x^2 so that I can put it in a standalone function that I can use with matlab coder. If I do what you propose I will get an error because coder cant handle symbolic variables.

[Azzi Abdelmalek]

have you tried inline function?

y=inline('x.^2')

[Drew Mitchell]

That is also not supported by coder.

I appreciate the responses though Thanks!!

Answer 2

[Walter Roberson]

syms is not supported by the coder either. So anything having to do with symbolics has to be done and over with before code is generated. At the time you are running the symbolic code, you can use matlabFunction to write to a file.