[R] R help with princomp and pam clustering

[Tyler82]

Hi JorisMeys and thanks!


JorisMeys wrote:
> 
> On Thu, Nov 26, 2009 at 1:04 AM, Tyler82 <procaccianti.claudio at gmail.com>
> wrote:
>>
>> Hi all!
>> I am working with R package cluster and I have a little problem:
>> let's say I have two datasets...first one ("A") is divided into 4
>> clusters
>> by means of Pam algorythm.
>> Let's say I want to project the second database ("B") onto the Comp.1 X
>> Comp.2 graph, and see where its elements are placed.
>> The two datasets are made of different dim (54x19 and 28x19). I tried to
>> extract the $loadings of the A clustering but I can't seem to figure out
>> how
>> to use them with B :(
> 
> Prin <- princomp(A)
> predict(Prin,B)
> 
> in the assumption that the variable names in both dataframes are equal.

A and B are equal in column names (variables) but different in rownames
(observations), but still it doesn't work.
If I use 
A<-princomp(matrix, cor=ncol(pamX$data)!=2)$loadings 
and then
predict(A,B)
then the answer is that there is no valid method
(My R version is in Italian...the original message is -Errore in
UseMethod("predict") : nessun metodo applicabile per "predict"- )
If I use
A<-princomp(matrix, cor=ncol(pamX$data)!=2)
then it says the index is out of limit

Thank you again!!

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