Den 2007-02-17 08:15, GRAHAM LEASK skrev:> Is there a function available in R that implements Mojena's Upper
> Tail Rule or that draws a Mojena plot?
>
> I would also like to find a function that implements Duda and Hart's
> stopping rule.
>
> Finally with function cophenet how can I achieve a straightforward
> Cophenet correlation coefficient (i.e. one number for example 0.876)
I'm neither aware of the function `cophenet' (and RSiteSearch
couldn't
find it) nor the ``...Cophenet correlation coefficient...''.
> that gives the agreement between the structure of the data as
> interpreted by the clustering method and the original data?
From this description, you're probably looking for the cophenet*ic*
correlation. `cophenetic' (in package `stats' that ships with R)
computes cophenetic distances, and from these and the original distances
it's straighforward to get what you want using `cor'. See
`?cophenetic'
for examples.
HTH,
Henric
>
> If anyone could let me know where I can find a script file for these
> functions I would greatly appreciate it.
>
>
> Kind regards
>
>
> Dr Graham Leask Economics and Strategy Group Aston Business School
> Aston University Aston Triangle Birmingham B4 7ET
>
> Tel: Direct line 0121 204 3150 email g.leask at aston.ac.uk
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>
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