gTree
.This function creates a graphical object which contains several other graphical objects. When it is drawn, it draws all of its children.
It may be convenient to name the elements of the collection.
grid.collection(..., gp=gpar(), draw=TRUE, vp=NULL)
"grob"
.gpar
, typically the output
from a call to the function gpar
. This is basically
a list of graphical parameter settings.grid.grob
.