How to plot unit sphreres?

Hey Guys, kind of new here so this is a noob question. I want to plot different unit spheres, meaning this equation has to be solved for the euclidean norm (n=2):

sqrt(x^2+y^2)=1

So I came up with this solution.

 [X,Y] = meshgrid(linspace(-1,1));
 n=2;
 f = (X.^n + Y.^n).^(1/n);
 contour(X,Y,f)

Unfortunatly contour plots not only the unit sphere for my euclidian norm, but also additional circles with a different radius.

How do I tell contour to only plot my unit sphere ? Is contour even the right function for this kind of problem ? Would be really nice if someone could help me out.

[Nipun]

Hi DerMischa,

Yes, definitely: contour will plot all the circles (or surfaces in two-dimension) that satisfy your equation.

For plotting a unit sphere, there are some inbuilt MATLAB functionalities you may leverage: sphere , axis

An extensive guide to plotting sphere on different axis with different radi is linked here: https://in.mathworks.com/help/matlab/ref/sphere.html

Hope this helps!

Answer 1

[Ashutosh Thakur]

You can create unit sphere using inbuilt matlab function

sphere
axis equal

You can follow this article to know more about sphere function.

Sphere