How do I draw an ellipsoid with given axes and radiuses

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俊鹏 陈
俊鹏 陈 2022-4-21
编辑： Matt J 2022-4-21
Take my date set：
V=[-0.8130 -0.0358 -0.5812;
0.5816 -0.0000 -0.8135;
-0.0291 0.9994 -0.0208];
The three columns of V represent the main axis.
D = [0.0002,0.0069,0.0079];
Each column of D corresponds to the main axis radius of V.
Given these conditions, how to draw the corresponding ellipse in 3d space?
Thank you very much for your answer. Any help will be appreciated!

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Matt J
Matt J 2022-4-21
编辑：Matt J 2022-4-21
One option is to download this,
https://www.mathworks.com/matlabcentral/fileexchange/87584-object-oriented-tools-for-fitting-conics-and-quadrics
Then, it's just
V=[-0.8130 -0.0358 -0.5812;
0.5816 -0.0000 -0.8135;
-0.0291 0.9994 -0.0208];
D = [0.002,0.0069,0.0079]; %<---I changed this
gtEllip=ellipsoidalFit.groundtruth([],[0,0,0],D,[0,0,0]);
gtEllip.R=V;
plot(gtEllip);
view(25,10);

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