[R] R help with princomp and pam clustering

[joris meys]

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.

> Using princomp I menaged to extract the $scores and plot the graph. Wouldn't
> using princomp on the B dataset generate different PC?

Indeed, it would.

> Thank you all!
> Bye!!
>
> Claudio
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