Some basic facilities for ternary fields and plots The package contains routines to 1) project unity-summed triples to unit-square doubles and vice versa, 2) make a grid of unity-summed triples paired to doubles, 3) evaluate a function over the grid and 4) make simple plots including ternary contour plots over a grid of values. Software Tim Keitt <tkeitt@gmail.com> Tim Keitt <tkeitt@gmail.com> GPL-2 2011-07-25 application/tgz http://CRAN.R-project.org/package=trifield