R help - Oct 2003 - error in documentation

Hi,
  there appears to be an error in the documentation for fanny. In the
Details section, the equation representing the objective function has no
variable k in it, but the  two lines following it mention:

where n is the number of observations, k is the number of clusters, and
d(i,j) is the dissimilarity between i and j

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Rajarshi Guha <rxg218 at psu.edu> <http://jijo.cjb.net>
GPG Fingerprint: 0CCA 8EE2 2EEB 25E2 AB04 06F7 1BB9 E634 9B87 56EE
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After a number of decimal places, nobody gives a damn.

>>>>> "Rajarshi" == Rajarshi Guha <rxg218 at
psu.edu>
>>>>>     on 24 Oct 2003 10:17:34 -0400 writes:
    Rajarshi> Hi, there appears to be an error in the
    Rajarshi> documentation for fanny. In the Details section,
    Rajarshi> the equation representing the objective function
    Rajarshi> has no variable k in it, but the two lines
    Rajarshi> following it mention:

    Rajarshi> ... k is the number of clusters, ..........

You are correct -- note however that this is only for the text
version of the help page (not the nicely formatted  latex/ps/pdf
one which has real mathematical formulae) -- and which you can
get from {when you have latex installed on your computer}
    help(fanny, offline = TRUE)

The corrected "text-version" of the formula is

    SUM_[v=1..k] (SUM_(i,j) u(i,v)^2 u(j,v)^2 d(i,j)) / (2 SUM_j u(j,v)^2)}
       ^^^^^^^^

Martin Maechler <maechler at stat.math.ethz.ch>
http://stat.ethz.ch/~maechler/
Seminar fuer Statistik, ETH-Zentrum  LEO C16	Leonhardstr. 27
ETH (Federal Inst. Technology)	8092 Zurich	SWITZERLAND
phone: x-41-1-632-3408		fax: ...-1228			<><