Resolution of plot code errors

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영석
영석 on 1 Dec 2023
Commented: Voss on 1 Dec 2023
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

Accepted Answer

Les Beckham
Les Beckham on 1 Dec 2023
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

More Answers (1)

Voss
Voss on 1 Dec 2023
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]);
  2 Comments
영석
영석 on 1 Dec 2023
That's what I wanted. thank you:)
Voss
Voss on 1 Dec 2023
You're welcome! If this answer helped, please vote for and/or Accept it. Thanks!

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