Arguments
object
fitted model object of class itree. This is
assumed to be the result
of some function that produces an object with the same named
components as that returned by the itree function.
digits
the number of digits to be used for numeric values.
All of the itree functions that call labels
explicitly set this value, with options("digits")
as the default.
minlength
the minimum length for abbreviation of character or factor variables.
If 0 no abbreviation is done; if 1 then single letters are used with
"a" for the first level, "b" for the second and so on.
If the value is greater than 1, the
abbreviate function is used.
pretty
an argument included for backwards compatibility:
pretty=0 implies minlength=0,
pretty=NULL implies minlength=1, and
pretty=TRUE implies minlength=4.
collapse
logical.
The returned set of labels is always of the same length as the number
of nodes in the tree.
If collapse=TRUE (default),
the returned value is a vector of labels for the branch leading into
each node, with "root" as the label for the top node.
If FALSE, the returned value is a two
column matrix of labels for the left and right branches leading
out from each node, with "leaf" as the branch labels for terminal
nodes.
...
optional arguments to abbreviate.