look at help for prcomp() to find the correct spelling of this technique. 

----- Original Message ----- 
From: "piero campa" <piero.campa@gmail.com> 
To: r-sig-geo@stat.math.ethz.ch 
Sent: Monday, February 14, 2011 10:23:47 AM 
Subject: Re: [R-sig-Geo] how to do a principle component analysis with geo-referenced points 


I guess that the answer is that actually the attribute "dimnames" of the 
returned x scores prcomp() can be exploited to recover the spatial reference 
as far as the object has a rectangular shape in space. 
My spatial object was irregularly shaped instead, then I guess that these 
"dimnames" were arranged differently underneath. 

Regards, 
Piero 
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