labels.rpart {rpart}  R Documentation 
This function provides labels for the branches of an
rpart
tree.
## S3 method for class 'rpart': labels(object, digits=4, minlength=1, pretty, collapse=TRUE, ...)
object 
fitted model object of class rpart . This is
assumed to be the result
of some function that produces an object with the same named
components as that returned by the rpart function.

digits 
the number of digits to be used for numeric values.
All of the rpart 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 .

Vector of split labels (collapse=TRUE
) or matrix
of left and right splits
(collapse=FALSE
) for the supplied
rpart
object. This function is called
by printing methods for rpart
and is not
intended to be called
directly by the users.