Description Usage Arguments Warning Examples
Given the first two probabilities of a trinomial distribution
before and after a change, effect()
adds an arrow to an existing
ternary plot. If the probability distribution does not change, a
point (instead of an arrow) is added to the plot.
1 
x, y 

... 
other graphical parameters such as 
length 
length of the edges of the arrow head (in inches). 
Only when effect()
is passed to Ternary::AddToTernary()
as the first argument, arrows and points are drawn consistently
with ternary coordinate system, otherwise effect
draws both
arrows and points according to a Cartesian coorinate system
centered on (0,0.5,0.5).
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15  TernaryPlot()
# Arrow
plot3logit:::effect(c(0.1, 0.2), c(0.3, 0.2))
# Point
plot3logit:::effect(0.3, 0.2)
# Compare the two coordinate systems
plot3logit:::effect(0.1, 0.2, pch = 19, col = 'red')
AddToTernary(plot3logit:::effect, list(c(0.1, 0.2, 0.7)), pch = 19, col = 'blue')
# The origin of Cartesian coordinate systems
plot3logit:::effect(0, 0, pch = 19, col = 'red')
AddToTernary(plot3logit:::effect, list(c(0, 0.5, 0.5)), pch = '+', col = 'white')

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