[slightly OT] plotting a (pm3d) closed surface with arbitrary vertices

[Dr. J. Z. <joh...@ze...>]

Hello,

forgive me, this is OT, but I guess the guys at this list might be
able to give me help.

I frequently like to splot a (pm3d) surface for which I have arbitrary
x, y, z vertices. The surface is usually well-behaved in a sense that
it's smooth, w/o singularities and has only long-range (low frequency)
changes.

As first approximation -- and this is the best I have -- I use 'splot
with points' using 'linetype pal' to get colors and I use pretty large
point sizes to get part of the surface "covered".

Any ideas how to get a real closed surface? -- I guess I'd need
something like a function which searches the closest vertices (in x, y)
and then connects the vertices by triangular surfaces.

Any hints much appreciated.

-- 
Johannes