Plot cells with variables?

Hi guys

I want to plot cells of a matrix. For example;

syms x;
A=[0;1;0;1];
A=A*x^2+A;
plot(x,A(2,1))

But it returns error for me.

Error using plot

A numeric or double convertible argument is expected

Can you please help?

Thank you!

Answer 1

[Awais Saeed]

I think you want to plot the symbolic expression x^2+1 (that's what A(2,1) gives you). If that's the case, use fplot()

syms x;
A = [0;1;0;1];
A = A*x^2+A

A = 

fplot(A(2,1)) % its default interval is [-5 5].
title('plot of X^2+1')
ylabel('x^2+1')