Great, I didn't know about the use of '@' Thank you Sylvain
2010/5/13 Carson Farmer <carson.far...@gmail.com>: > Hi, > >> I only need, for now, to work on two areas: Burgundy and Centre, >> I would like to extract those two areas from the France file, >> I tried, naïvely, >> Centre <- France[France$NAME_1=="Centre", ] > > try: >> Centre <- france[fra...@data$name_1=="Centre",] > >> PS: I found quite a lot of information on points, ploygons, or lines, >> but few on spatialpolygonsdataframe besides they are "a set of spatial >> polygons", Any reference on their inside structure ? > > see: >> ?SpatialPolygonsDataFrame > A SpatialPolygonsDataFrame is made up of a data.frame and an object of > class SpatialPolygons, which is a list of objects of class Polygons, > which is made up of a list with Polygon class objects. > You can use getSlots to list the available slots of the various object types. >> ?getSlots > > Regards, > > Carson > _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo