trifield (version 1.1)

abc2xy: Project unity-summed triples (a, b, c) to unit-square doubles (x, y)

Description

Given a matrix of ternary values, this function will compute their x, y coordinates.

Usage

abc2xy(abc)

Arguments

abc

A 3-column matrix containing unity-summed triples

Value

A matrix of x, y values, one per row

Details

The x, y coordinates are scaled such that the altitude of the equilateral triangle defining the ternary space is equal to one.

References

http://dx.doi.org/10.1016/j.ecolmodel.2012.05.020

See Also

xy2abc

Examples

# See demo(trifield)
## Not run: 
# grid.size = 128
# par(mar = rep(2, 4), oma = rep(0, 4))
# tg = ternary.grid(grid.size)
# f = function(x)
#         sin(2 * pi * x[1]) +
#         sin(3 * pi * x[2]) +
#         sin(4 * pi * x[3])
# z = ternary.apply(tg, f)
# tf = ternary.field(tg, z)
# plot(tf)
# ternary.legend()
# ## End(Not run)