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

[<HBB...@t-...>]

Dr. Johannes Zellner wrote:
> 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.

What you're looking for is (a variation of) 'set dgrid3d'.  I'm slightly 
worried you didn't manage to find that in the documentation by yourself.