R help - Jan 2003 - Principal comp. scores in R

Hello,  I am trying to run a PCA in R and I cannot get the PC scores for 
each of the values.  Using pcX <- princomp(X) then loadings(pcX) I can get a 
listing of the eigenvectors but not the actual PC scores for each value in 
the dataset.  I greatly appreciate any help anyone can offer

Thanks
Ken

try:

 > pcX$scores

and

 > pcX$loadings

cheers,

David Orlovich.

On Thursday, January 30, 2003, at 04:48 PM, kenneth fortino wrote:
>
> Hello,  I am trying to run a PCA in R and I cannot get the PC scores 
> for each of the values.  Using pcX <- princomp(X) then loadings(pcX) I 
> can get a listing of the eigenvectors but not the actual PC scores for 
> each value in the dataset.  I greatly appreciate any help anyone can 
> offer
>
> Thanks
> Ken
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> http://www.stat.math.ethz.ch/mailman/listinfo/r-help
>
Dr David Orlovich
Department of Botany,
The University of Otago,
P.O. Box 56,
Dunedin,
New Zealand.

Phone +64 3 479 9060
Fax +64 3 479 7583
david.orlovich at botany.otago.ac.nz
david.orlovich at unix.net
http://www.botany.otago.ac.nz/

Try:

res <- princomp(X, scores = TRUE)
res$scores

Cheers,

Simon.

Simon Blomberg
Depression & Anxiety Consumer Research Unit
Centre for Mental Health Research, Australian National University
Simon.Blomberg at anu.edu.au  +61 (2) 6125 3379


-----Original Message-----
From: kenneth fortino [mailto:k_fortino at hotmail.com]
Sent: Thursday, 30 January 2003 2:49 PM
To: r-help at stat.math.ethz.ch
Subject: [R] Principal comp. scores in R



Hello,  I am trying to run a PCA in R and I cannot get the PC scores for 
each of the values.  Using pcX <- princomp(X) then loadings(pcX) I can get a 
listing of the eigenvectors but not the actual PC scores for each value in 
the dataset.  I greatly appreciate any help anyone can offer

Thanks
Ken

______________________________________________
R-help at stat.math.ethz.ch mailing list
http://www.stat.math.ethz.ch/mailman/listinfo/r-help

The package ade4 is devoted to multivariate analysis. You can have a 
look  at the function dudi.pca of the ade4 package for principal 
component analysis.
>Hello,  I am trying to run a PCA in R and I cannot get the PC scores 
>for each of the values.  Using pcX <- princomp(X) then loadings(pcX) 
>I can get a listing of the eigenvectors but not the actual PC scores 
>for each value in the dataset.  I greatly appreciate any help anyone 
>can offer
>
>Thanks
>Ken
>
>______________________________________________
>R-help at stat.math.ethz.ch mailing list
>http://www.stat.math.ethz.ch/mailman/listinfo/r-help
-- 
St?phane DRAY
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Tel : 04 72 43 27 56			   Fax : 04 78 89 27 19
       04 72 43 27 57 	   E-mail : dray at biomserv.univ-lyon1.fr 
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