Re: Additional graphing possibility?

[Ethan M. <merritt@u.washington.edu>]

On Thursday 18 February 2010, Lar...@ao... wrote:
> Dear sirs:
>  
>    I could not find any references to "ternary" or "mixture"  graphs/plots. 
>  These are triangular graphs used to plot data when the three  data points 
> add up to 100%.  They are used in geology, chemistry, baking,  rocket 
> propellant compositions testing, etc.  When data are plotted, they  appear, 
> typically, as contours on the triangularly-shaped graph.  Have I  just missed it 
> or does GNUPlot not cover this type of graph?  Thank you for  your attention.

I do not know of a convenient way to create such graphs in gnuplot.
You could plot the points themselves using parametric functions:
   plot 'data' using (f($1,$2,$3)):(g($1,$2,$3))

See also
   http://warmada.staff.ugm.ac.id/Graphics/gnuplot/petclass/pearce.html

But creating and labelling the axes would be difficult.

> Sincerely,
> Lawrence G. Teebken  (_larry79054@aol.com_ (mailto:lar...@ao...) )
> P.S.:  I searched, in vain, for a 'contact us' box for asking  questions.  
> I hope this is the proper procedure.

Sure. 
You could also use SourceForge tracker site to create a Feature Request.
It sounds like an interesting project to implement this, but non-trivial.