ellipsoid
Generate ellipsoid
Syntax
[x,y,z] = ellipsoid(xc,yc,zc,xr,yr,zr,n)
[x,y,z] = ellipsoid(xc,yc,zc,xr,yr,zr)
ellipsoid(axes_handle,...)
ellipsoid(...)
Description
[x,y,z] = ellipsoid(xc,yc,zc,xr,yr,zr,n) generates
a surface mesh described by three n+1-by-n+1 matrices,
enabling surf(x,y,z) to plot an ellipsoid with
center (xc,yc,zc) and semi-axis lengths (xr,yr,zr).
[x,y,z] = ellipsoid(xc,yc,zc,xr,yr,zr) uses n
= 20.
ellipsoid(axes_handle,...) plots
into the axes with handle axes_handle instead of
the current axes (gca).
ellipsoid(...) with no
output arguments plots the ellipsoid as a surface.
Examples
Surface Plot of Ellipsoid
Generate data for an ellipsoid with a center at (0,0,0) and semi-axis lengths (5.9,3.25,3.25). Use surf to plot the ellipsoid.
[x, y, z] = ellipsoid(0,0,0,5.9,3.25,3.25,30);
figure
surf(x, y, z)
axis equal
Algorithms
ellipsoid generates the data using the following
equation:
Note that ellipsoid(0,0,0,1,1,1) is equivalent to a unit sphere.