If it is a grid on an equilateral triangle you are wanting, there should be
some available in relation to metallurgy, and maybe solution chemistry.
Ternary phase diagrams use this method of display.
the reason the 60 degree angles are "not so easy to program" is that the
pseudo-y dimension is partly a function of the pseudo-x dimension, when
they are represented in Cartesian coordinates.
there is a constraint, that the sum of the pseudo-x, plus pseudo-y, plus
pseudo-z must equal 1 (100%).
Once an enterprising programmer understood these relationships, it should
not be a big issue to write code to plot out points in the 'simplex'
coordinate system, from the initial values. He said.
Jay
Donald Burrill wrote: [snip]
>
> Of course, if you're going to have large numbers of graphs to produce,
> you'll want some suitable computer software. I don't know if any
> exists for this particular purpose. The 60-degree angles are not so
> easy to program as 90-degree angles, for some reason. You might
> consider, in the absence of anything better, a standard Cartesian
> graphing program, plotting one axis from 0 to 100% on the abscissa, a
> second axis form 0 to 100% on the ordinate, and have the program draw in
> the 45-degree (or equivalent, if the physical scales differ between
> abscissa and ordinate) line corresponding to the third axis. The
> resulting graph will be somewhat distorted ("leaning toward Sawyer's",
> as we sometimes say in these parts) but recognizable, I should think.
> -- DFB.
--
Jay Warner
Principal Scientist
Warner Consulting, Inc.
4444 North Green Bay Road
Racine, WI 53404-1216
USA
Ph: (262) 634-9100
FAX: (262) 681-1133
email: [EMAIL PROTECTED]
web: http://www.a2q.com
The A2Q Method (tm) -- What do you want to improve today?
.
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