[R] Dendrogram for many cases

From: David Lucy <dlucy_at_maths.ed.ac.uk>
Date: Wed 26 Oct 2005 - 20:23:26 EST


Dear All,

I have a cluster object based on a
dissimilarity matrix from about 1,100
cases and wish to know whether anyone
can think of any tips to display some
form of graphical output which would
give some sense of the similarity
between the cases.

A standard form of dendrogram would be
fine, but with so many cases the
dendrogram on the standard devices
(R-2.20 on NT4) is very compact in the
x-dimension. I wonder whether there is
any way that the dendrogram can be
subdivided into discrete pieces?

Failing that, is there any other means
of graphically representing the
dissimilarity matrix. I am only
interested in the low order
dissimilarity rather than high order
structure between these cases.

A further constraint is that the NT4 box is well bolted down in that it has no
means by which data can be transfered
to, or from it.

Cheers,

David.

#########################################
Dr. David Lucy
School of Mathematics
JCMB
King's Buildings
Edinburgh University
Edinburgh
EH9 3JZ

tel: 0131 650 5086
e-mail: dlucy@maths.ed.ac.uk
web: http://www.maths.ed.ac.uk/~dlucy/
#########################################



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