Is this a (more-or-less) one-time effort, or will you have lots of these
to do? If you only need a few such graphs, consider doing it by hand
(gasp! ;). There used to be available a book called "Graph Paper from
your Copier", which consisted mostly of originals of an amazing variety
of graphs, which one could then make xerox copies of. One of them is a
2-D simplex, with the three triangular axes conveniently laid out at 60
degree angles on 0-to-100 scales. My copy is not at hand, and I don't
remember the publisher. Sorry.
Whether drafting supply stores still carry stocks of actual
graph paper these days I don't know, but it might be worth a look.
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.
On 13 Feb 2003, Ram wrote:
> Can somebody direct me to some graphing tool that can plot a simplex
> for mixtures. I don't want a mixture design software. I have a bunch
> of points (x1,x2,x3) and would like to plot it on a 2-D simplex.
-----------------------------------------------------------------------
Donald F. Burrill [EMAIL PROTECTED]
56 Sebbins Pond Drive, Bedford, NH 03110 (603) 626-0816
.
.
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