MATLAB: Can’t I plot a graph

plot

%Hi guys. I am a noob here. I did Matlab and Simulink in Uni before but I am still a noob in it and hope to spent sometime to %learn Matlab. I just wanted to try plot an equation and my script is as follows:
syms x;
y = x^2 + 4*x + 4
plot (y)
%Answer:
>> pl1
y =
x^2 + 4*x + 4
Error using plot Conversion to double from sym is not possible.
Error in pl1 (line 5) plot (y)

Best Answer

Why do you need to plot this symbolically:
   x = -2:0.01:2; % or whatever the range
   y = x.^2 + 4*x + 4;
   plot(x,y)
If you want to plot symbolically:
 syms x;
 ezplot(x^2+4*x+4,[-2 2])
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