[R] how to draw a spherical quadrant

[[Ricardo Rodriguez] Your XEN ICT Team]

Thanks for pointing me on that direction! Extremely feature-rich this, 
as usual, package!

Duncan Murdoch wrote:
> 
> The rgl package can do general 3D plotting, but I don't know of anyone 
> who has put together what you're looking for, so you'll need to compute 
> the individual line segments or polygons yourself.

I'd found persp, but rgl seems much more suitable for this purpose.

Now the challenge is to find time and be able to put things together!

Thanks for your help,

Ricardo

-- 
Ricardo Rodríguez
Your XEN ICT Team