How to use subs with sym

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hadi
hadi 2015-3-17
评论： hadi 2015-3-17
Dear All,
I have the following code:
clc
clear all
close all
f=@(x,y)x^2+y;
f=sym(f);
out=subs(f,x,2)
Could you please tell me what should I do to prevent getting an error.
Thanks a lot.

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采纳的回答

Mischa Kim
Mischa Kim 2015-3-17
hadi, you need to define x as a symbolic variable
syms x y
f = @(x,y) x^2 + y;
f = sym(f);
out = subs(f,x,2)
out =
y + 4

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