spherical plots.

I will certainly do that. A unit sphere is available in the resource center that only defines three functions X Y and Z. And then in the box on the chart simply enter X,Y,Z.

Thanks for your help many times before, but unfortunately I do not have internet access. If you have plotted such a sphere you would need to post it here in a way it can be viewed on a computer that does not have the mathcad program. I find CreateMesh and fitmap difficult to use. I have plotted a half sphere (well actually a sphere would sit nicely into the shape created) just accidently by creating a matrix of points. Fred has also been of regular help and he is probably somewhat amused at my struggle to master this subject matter. Once I get that first sphere to show up and exactly match the one in my multivariable Calculus book, the light goes on . . .and suddenly I see whats going on . . .