[R-sig-Geo] shapefile errors and kriging limits

uestion is how can I can I generate a set of point that match a specific area (because I have a specific limite(area) in an esri's shapefile). Thanks in advance. Carlos Carlos GUERRA Gabinete de Sistemas de Informacao Geografica Escola Superior Agraria de Ponte de Lima Mosteiro de R

[R-sig-Geo] deleting duplicates on a geodata object

Dear friends, I am wondering if there is a quick method for deleting duplicates on a geodata object... Can anyone point me in the right direction?? Best regards, Carlos ___ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman

[R-sig-Geo] how to do a principle component analysis with geo-referenced points

Dear friends, I wanted to know how to do a principle component analysis (PCA) from geo-referenced points. I have a list like: geo$xy with coordinates, and geo$data with the data that I want to do the analysis …is this right? +++ Carlos GUERRA Instituto