Symbolize volume fraction on an existing soil profile collection plot.
addVolumeFraction(x, colname, res = 10, cex.min = 0.1,
cex.max = 0.5, pch = 1, col = "black")
a SoilProfileCollection
object
character vector of length 1, naming the column containing volume fraction data (horizon-level attribute)
integer, resolution of the grid used to symbolize volume fraction
minimum symbol size
maximum symbol size
plotting character
symbol color, either a single color or as many colors as there are horizons in `x`
This function can only be called after plotting a SoilProfileCollection
object.