How to animate the motion of a spherical object in a circular path

Hi all

I am trying to get a spherical object to move in a circular path. This is the path below

circle = rsmak('circle');
fnplt(circle), axis square

Thanks,

Jobe

[Walter Roberson]

Technical reference (as I had never heard of the routine before):

http://www.mathworks.com/help/curvefit/rpmak.html