Usage: <tt>input = [ <i>enable x0 y0 z0 a b c</i> ] removeellipsoid</tt>

<p>
If <tt><i>enable</i> = 1</tt> then this command is activated.
<tt><i>x0 y0 z0</i></tt> specify the center of the ellipsoid (in real coordinates)
and <tt><i>a b c</i></tt> specify the semi-axes of the ellipsoid (in real coordinates).
All atoms falling within the ellipsoid are removed.

