Graphic of 2π periodic function

[Abdelkader]

Can someone tell me please how do I plot 2D graphic of 2\pi periodic function y = x^2-\pi^2 with range of x = -\pi to x = \pi ? Thank you

[onkanat]

x = linspace(-%pi,%pi,64);
y = x.^2-%pi.^2;
plot(x,y);

And this Plot 2D Graphic Beginner Question

[mottelet]

Hello, if you want to plot this periodic function outside the principal range of x, you have to use pmodulo to compute the principal determination of each x, like this:

x = linspace(-10,10,1000);
xp = pmodulo(x+%pi,2*%pi)-%pi;
plot(x,xp.^2-%pi^2)