Hi Alex, You have to assign the plot to a temporary variable (like tmp <- spplot(...)) and then use print(tmp1) to save it in the png-file
so somethink like: tmp <- spplot(...) png(filename=...) print(tmp) dev.off() Succes! Henk ------------------------- Henk Sierdsema SOVON Vogelonderzoek Nederland / SOVON Dutch Centre for Field Ornithology Rijksstraatweg 178 6573 DG Beek-Ubbergen The Netherlands tel: +31 (0)24 6848145 fax: +31 (0)24 6848122 -----Oorspronkelijk bericht----- Van: r-sig-geo-boun...@stat.math.ethz.ch [mailto:r-sig-geo-boun...@stat.math.ethz.ch]namens Alexandre VILLERS Verzonden: maandag 7 december 2009 15:09 Aan: Aide R SIG GEO Onderwerp: [R-sig-Geo] problem saving spplot in a loop Hey, I wrote a loop and want to save plots of multiple SpatialPolygonDataFrame objects with something like png(paste("K:/Outarde/ADrien/FigTemp/PGR",l,"_",j,".png",sep=""), height=1000, width=2000,res=300) b<-spplot(grTs[,c("PGRobs04","PGRobs48")], col.regions=palAb(30) dev.off() and png(paste("K:/Outarde/ADrien/FigTemp/Abondance",l,"_",j,".png",sep=""), height=1000, width=3000,res=300) spplot(grTs[,c("ov2000","ov2004","ov2008")], col.regions=palAb(17),at=cutsAb) dev.off() When I run "manually" the code (specifying the l and j values for the loop), everything is fine and I get nice png files. When the code loops on its own, I get blank images. I suspect this is a problem of the time taken by spplot to build the image in time for saving in the loop. Is this correct and how can I properly overcome this problem ? Best regards Alex -- Alexandre Villers PhD Candidate AgriPop Centre d'Etudes Biologiques de Chizé-CNRS UPR1934 79360 Beauvoir sur Niort Phone +33 (0)5 49 09 96 13 Fax +33 (0)5 49 09 65 26 __________ Information from ESET Mail Security, version of virus signature database 4667 (20091207) __________ The message was checked by ESET Mail Security. http://www.eset.com _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
