3d surface plot of an elliptic shape
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I have the values of x y and z in vectors, z is found by a mathematical method. The values of x and y are based on an ellipse equation (which means I can't use linspace(min,max) on x and y because it takes points out of the elliptic boundary).
I have to do a 3d plot, can someone help?
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John D'Errico
le 14 Déc 2022
Modifié(e) : John D'Errico
le 14 Déc 2022
If all you want to do is plot the ellipsoid, then you are doing it the wrong way. Just use fimplicit3. You never need to compute x,y, and z at all. For example...
C = [1 2 3];
H = randn(3);H = H'*H; % just insures that H is SPD, so the result will indeed be an ellipse.
syms x y z
E = ([x,y,z] - C)*H*([x,y,z] - C).' - 1;
fimplicit3(E)
axis equal
So all you need to do is feed the defining equation to fimplicit3.
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