[Solved] Creating a ternary plot

Question

I started with

library(ggtern)
ggtern(df,aes(GRAVEL,SAND,MUD))+geom_point()

Adding fill=Root within the aes() function and shape=21 outside would colour in the points according to the value of some other variable, but it only makes most sense to colour the points if you have a separate variable in your data set which could determine the colour — your example above only provides three variables (you could colour them randomly, but that seems a bit silly).

Accepted Answer

I started with

library(ggtern)
ggtern(df,aes(GRAVEL,SAND,MUD))+geom_point()

Adding fill=Root within the aes() function and shape=21 outside would colour in the points according to the value of some other variable, but it only makes most sense to colour the points if you have a separate variable in your data set which could determine the colour — your example above only provides three variables (you could colour them randomly, but that seems a bit silly).