Banner Of Agglomerative Hierarchical Clusterings
DESCRIPTION:
Creates the banner of an agnes object.
USAGE: 
plot.agnes(x, ...)
REQUIRED ARGUMENTS:
x:
an object of class "agnes", created by the function agnes.

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

VALUE:
a NULL value is returned.

SIDE EFFECTS:
A banner is plotted on the current graphics device.

DETAILS:
The banner displays the hierarchy of clusters, and is equivalent to a tree. See Rousseeuw (1986) or chapter 5 of Kaufman and Rousseeuw (1990). The banner plots distances at which objects and clusters are merged. The objects are listed in the order found by the agnes algorithm, and the numbers in the height vector are represented as bars between the objects.

REFERENCES:
Kaufman, L. and Rousseeuw, P.J. (1990). Finding Groups in Data: An Introduction to Cluster Analysis. Wiley, New York.

Rousseeuw, P.J. (1986). A visual display for hierarchical classification, in Data Analysis and Informatics 4. Edited by E. Diday, Y. Escoufier, L. Lebart, J. Pages, Y. Schektman, and R. Tomassone. North-Holland, Amsterdam. pp. 743-748.

SEE ALSO:
agnes , agnes.object , pltree.agnes , par .
EXAMPLES: 
plot(agnes(votes.repub))