How to plot unit sphreres?

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DerMischa
DerMischa 2017-11-17
评论： Nipun 2022-7-4
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.
  1 个评论
Nipun
Nipun 2022-7-4
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!

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回答（1 个）

Ashutosh Thakur
Ashutosh Thakur 2022-6-30
Ran in:
You can create unit sphere using inbuilt matlab function
sphere
axis equal
You can follow this article to know more about sphere function.
Sphere

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