labclust(x, y, labels = <<see below>>)

x,y:

coordinates of points. The coordinates can be given by two arguments that are vectors or by a single argument x which is a univariate time series, a complex vector, a matrix with 2 columns, or a list containing components named x and y. Typically, these are the coordinates of the leaves of the tree, as produced by plclust. Missing values (NAs) are allowed.

labels:

control of labels on the cluster leaves. By default, leaves are labeled with the object number. If labels is a character vector, it is used to label the leaves. Otherwise it is interpreted as a logical flag (in particular, the value FALSE suppresses any labeling of leaves, as is appropriate with large trees).

Missing values are not accepted.

Graphical parameters may also be supplied as arguments to this function (see par). In addition, the high-level graphics arguments described under par and the arguments to title may be supplied to this function.

# create a sample object using built-in dataset
x <- hclust(dist(longley.y))
xy <- plclust(x, plot = FALSE)  # save coords of tree
plclust(x, label = FALSE)  # plot it
labclust(xy)  # now label it with the object number

# can use a character vector of names to label the leaves
labclust(xy, labels=listnames) # vector is called "listnames"