Reference Grid for Ternary Plot
panel.ternaryplot.grid(at = seq.int(0, 1, by = 0.2),
alpha = reference.line$alpha, col = reference.line$col,
lty = reference.line$lty, lwd = reference.line$lwd)
Plots a layer inside a panel of a lattice
plot.
Where to draw the reference lines
Alpha
Color
Line type
Line weight