[R] correspondance analysis & clustering

[Christian Hennig]

Hi,

as far as I remember, no answer until now...?
Please tell us exactly what you have done, including data, if possible.
Without this information no help is possible.

Christian

On Mon, 3 Feb 2003, Vincent Stoliaroff wrote:

> 
> 
> Hi
> 
> 1) I am using the function ca() of the package multiv to make a 
> correspondance analysis of a matrix of categorical datas which are 
> numericaly coded. I would like to be sure that it is considered as a matrix 
> of categorical datas and not numerical. I cannot find any explicit mention 
> of that in the help file for this function
> 
> 2) I would like to take the resulting matrix rproj to do a clustering.
> I use hierclust() and partition() of the package multiv
> 
> regarding hierclust()
> when I use the method number 1 i get this error:
> Error in hclust(a, method) : invalid clustering method
> 
> when I change the number of the method I get
> Error in pmatch(x, table, duplicates.ok) :
>         argument is not of mode character
> 
> 
> As for the partition() function, I also have some troubles. It seems I 
> should mention a vector of clustered centers for initiating the iterative 
> optimization process. But I do not know where to enter it.
> I get the following message
> Error in matrix(0, ng, m) : non-numeric matrix extent
> 
> Has anybody ever encountered those problems?
> Thanks a lot
> 
> 
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-- 
***********************************************************************
Christian Hennig
Seminar fuer Statistik, ETH-Zentrum (LEO), CH-8092 Zuerich (currently)
and Fachbereich Mathematik-SPST/ZMS, Universitaet Hamburg
hennig at stat.math.ethz.ch, http://stat.ethz.ch/~hennig/
hennig at math.uni-hamburg.de, http://www.math.uni-hamburg.de/home/hennig/
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