Resolution of plot code errors

syms x;
y=1/sqrt((1-x^2)^2+(2*x)^2);

plot(x,y);
xlim([0 5]); ylim([0 4]);

I can't draw a graph. A code error appears

I need your help

Answer 1

[Les Beckham]

Why are you trying to do this with symbolic variables? It works using simple numeric variables.

x = linspace(-5, 5, 500);
y = 1 ./ sqrt((1-x.^2).^2 + (2*x).^2); % <<< use element-wise powers and division
plot(x, y);
% xlim([0 5]) 
ylim([0 4])
grid on

[영석]

thank you:)

[Les Beckham]

You are quite welcome.

Answer 2

[Voss]

Use fplot instead of plot:

syms x;
y=1/sqrt((1-x^2)^2+(2*x)^2);
fplot(x,y);
xlim([0 5]); ylim([0 4]);

[영석]

That's what I wanted. thank you:)

[Voss]

You're welcome! If this answer helped, please vote for and/or Accept it. Thanks!