[R] ternary diagrams with contours

[Prof Brian Ripley]

On Sat, 17 Jan 2004, Kyriakos Kachrimanis wrote:

> I would like to ask if it is possible to create ternary diagrams with
> contours. I want to plot a property that depends on a ternary mixture
> composition, so I think this would be the best way. I found a similar
> question in a past R-help list message but there was no answer.

It is possible.  Just produce a suitable matrix of values, set parts 
outside the triangle to NA and call contour.  I have done it several 
times.

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595