1. 2013-03-26 Re: [R-sig-Geo] Aggregate using Shapefile r-sig-geo Tiffany Smith 2. 2013-03-25 Re: [R-sig-Geo] Aggregate using Shapefile r-sig-geo Robert J. Hijmans 3. 2013-03-25 Re: [R-sig-Geo] Aggregate using Shapefile r-sig-geo Tiffany Smith 4. 2013-03-25 Re: [R-sig-Geo] Aggregate using Shapefile r-sig-geo Robert J. Hijmans 5. 2013-03-22 [R-sig-Geo] Aggregate using Shapefile r-sig-geo Tiffany Smith