[R-sig-Geo] difficult to subtract two column of my shapefile

Jonathan Maynard jjmaynard at ucdavis.edu
Tue Feb 24 16:49:31 CET 2009


An embedded and charset-unspecified text was scrubbed...
Name: not available
URL: <https://stat.ethz.ch/pipermail/r-sig-geo/attachments/20090224/7189f801/attachment.pl>


More information about the R-sig-Geo mailing list