On Mon, 17 Dec 2007 22:09:16 -0500, "AI4QJ" wrote:

When you do that, how does this show up in the coordinates?

Hi Dan,

Mathcad allows for as many coexisting simultaneous axis as you care.

As for 3D, this is called a contour plot (which can be done either
flat, or with relief). Excel will do this too (but with no particular
panache).

Seeing you are funds challenged, search the web for OpenDX (an IBM
project deeded to the public domain, and otherwise called Data
eXplorer). It can do the same thing. There is also a package called
XD3D, that is also from the OpenSource community.

The IBM package is the one most used by the research community; or at
least the ones I've been attending for 7 years.

73's
Richard Clark, KB7QHC