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How to use subs with sym

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hadi 2015-3-17

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评论： hadi 2015-3-17

采纳的回答： Mischa Kim

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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Mischa Kim 2015-3-17

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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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hadi 2015-3-17

Thank you so much I really appreciate your help.

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Mathematics and Optimization Symbolic Math Toolbox Symbolic Computations in MATLAB Conversion Between Symbolic and Numeric

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