Thank you Mayeul. Solved. Arnald
On 09/16/2010 01:59 PM, Mayeul KAUFFMANN wrote:
You can read your shapefile with: library(rgdal) countries_spdf<- readOGR(dsn=root_path, "countries_file_without_extension") #You'll have a spatial point data frame with marks. Look at str(countries_spdf). Try: plot(countries_spdf[countries_s...@data$area>1000]) Mayeul _____________________________________________________ Dr. Mayeul KAUFFMANN, Conflict Specialist European Commission, Joint Research Centre (JRC) Institute for the Protection and Security of the Citizen (IPSC) Global Security and Crisis Management - ISFEREA Via E. Fermi 2749 - I-21027 Ispra (VA), ITALY Phone: (+39) 033278 5071 http://isferea.jrc.ec.europa.eu/Staff/Pages/Kauffmann-Mayeul.aspx (Office: building 48c, 1st floor, room 123. TP: 483) _____________________________________________________ Dr. Mayeul KAUFFMANN, Conflict Specialist European Commission, Joint Research Centre (JRC) Institute for the Protection and Security of the Citizen (IPSC) Global Security and Crisis Management - ISFEREA Via E. Fermi 2749 - I-21027 Ispra (VA), ITALY Phone: (+39) 033278 5071 http://isferea.jrc.ec.europa.eu/Staff/Pages/Kauffmann-Mayeul.aspx (Office: building 48c, 1st floor, room 123. TP: 483) -----Original Message----- From: r-sig-geo-boun...@stat.math.ethz.ch [mailto:r-sig-geo-boun...@stat.math.ethz.ch] On Behalf Of Arnald Marcer Sent: Thursday, September 16, 2010 12:58 PM To: r-sig-geo Subject: [R-sig-Geo] how to filter a shapefile ? Hi, Can anyone give me a hint on how to extract/filter/subset polygons from a shapefile based on an attribute of its dbf table ? Example: shapefile: world.shp attributes of its dbf table: ID, AREA, COUNTRY, ... How can I plot a shapefile with only countries above a certain AREA value ? Thank you very much, Arnald Marcer CREAF _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
-- ----------------------------------------------------------------- Arnald Marcer Investigador Centre de Recerca Ecològica i Aplicacions Forestals (CREAF) Universitat Autònoma de Barcelona 08193 Barcelona Tel: 93 5811312 Fax: 93 5814151 ----------------------------------------------------------------- Arnald Marcer Researcher Centre for Ecological Research and Forestry Applications (CREAF) Autonomous University of Barcelona 08193 Barcelona Phone: +34 93 5811312 Fax: +34 93 5814151 _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo