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Symbolic or function handle to numeric

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Drew Mitchell
Drew Mitchell 2016-4-20
回答： Walter Roberson 2016-4-21
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

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回答（2 个）

Azzi Abdelmalek
Azzi Abdelmalek 2016-4-20
编辑：Azzi Abdelmalek 2016-4-20
syms x;
y=x^2;
out=subs(y,[1 2 3])
  3 个评论
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Azzi Abdelmalek
Azzi Abdelmalek 2016-4-20
编辑：Azzi Abdelmalek 2016-4-20
have you tried inline function?
y=inline('x.^2')
Drew Mitchell
Drew Mitchell 2016-4-20
That is also not supported by coder.
I appreciate the responses though Thanks!!

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Walter Roberson
Walter Roberson 2016-4-21
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.

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