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
2022-12-14
编辑:John D'Errico
2022-12-14
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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