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.