pltree.twins             package:cluster             R Documentation

Clustering Tree of a Hierarchical Clustering

Description:

     Draws a clustering tree (dendrogramm) of a 'twins' object, i.e.,
     hierarchical clustering, typically resulting from 'agnes' or
     'diana'.

Usage:

     ## S3 method for class 'twins':
     pltree(x, main = paste("Dendrogram of ", deparse(x$call)),
                  labels = NULL, ylab = "Height", ...)

Arguments:

       x: an object of class '"twins"', typically created by either
          'agnes()' or 'diana()'.

    main: main title with a sensible default.

  labels: labels to use; the default is constructed from 'x'.

    ylab: label for y-axis.

     ...: Graphical parameters (see 'par') may also be supplied as
          arguments to this function.

Details:

     Creates a plot of a clustering tree given a 'twins' object.  The
     leaves of the tree are the original observations.  In case of an
     agglomerative clustering, two branches come together at the
     distance between the two clusters being merged.  For a divisive
     clustering, a branch splits up at the diameter of the cluster
     being splitted.

Value:

     a NULL value is returned.

See Also:

     'agnes', 'agnes.object', 'diana', 'diana.object', 'hclust', 'par',
     'plot.agnes', 'plot.diana'.

Examples:

