Plot a Tree Object
Plot a tree object on the current graphical device
# S3 method for tree plot(x, y = NULL, type = c("proportional", "uniform"), ...)
an object of class
ignored. Used for positional matching of
character string. If this partially matches
"uniform", the branches are of uniform length. Otherwise they are proportional to the decrease in impurity.
An (invisible) list with components
giving the coordinates of the tree nodes.
As a side effect, the value of
type == "uniform" is stored in
.Tree.unif.? in the global environment, where
is the device number.