MATLAB Answers

# 3D plot of an ellipsoid

7 views (last 30 days)
Simone Fiumi on 12 Oct 2021
Commented: Simone Fiumi on 12 Oct 2021
Hi, I have to plot the following function on a 3d graph, it should be an ellipsoid. theta_ is a 1x3 vector and COV a 3x3 matrix
RC=@(x,y,z) (theta_-[x y z])*inv(COV)*(theta_-[x y z])'-5;
##### 0 CommentsShowHide -1 older comments

Sign in to comment.

### Accepted Answer

John D'Errico on 12 Oct 2021
Edited: John D'Errico on 12 Oct 2021
theta_ = [1 2 3];
COV = cov(rand(10,3)); % picking some arbitrary values for theta_ and COV...
RC=@(x,y,z) (theta_-[x y z])*inv(COV)*(theta_-[x y z])'-5;
fimplicit3(RC)
Warning: Function behaves unexpectedly on array inputs. To improve performance, properly vectorize your function to return an output with the same size and shape as the input arguments.
axis equal
box on
xlabel x
ylabel y
zlabel z
##### 1 CommentShowHide None
Simone Fiumi on 12 Oct 2021
Thank you!

Sign in to comment.

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by