Error of sym>convertChar
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Kutlu Yigitturk
on 20 Apr 2021
Commented: Kutlu Yigitturk
on 20 Apr 2021
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/590147/image.png)
How can I solve this problem? Thanks a lot.
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Accepted Answer
Stephan
on 20 Apr 2021
Edited: Stephan
on 20 Apr 2021
syms a b c x
f = str2sym('a*x^2 + b*x + c')
subs(f,x,5)
subs(f,[x a b c],[5 1 2 3])
2 Comments
Steven Lord
on 20 Apr 2021
Alternately since all the symbolic variables have been defined on the first line:
syms a b c x
f = a*x^2+b*x+c
subs(f, x, 5)
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