Hello I have a shapefile of Scotland, including the islands. The river flow data I am using is only for the mainland and for a clearer and larger map I would like to not plot Orkney and Shetland to the north of the mainland, as I don't need them.
The map I have I got from https://borders.ukdataservice.ac.uk/easy_download_data.html?data=infuse_ctry_2011 then I put the uk shapefile onto my laptop with no problems (I have sf running) the_uk<-st_read(dsn="C:/Users/nickm/Desktop/Shapefiles/infuse_ctry_2011.shp") scotland<-the_uk[2,] plot(scotland$geometry) This gives me a nice map of Scotland plus islands but obviously there are lots of separate polygons and if I go into the points with something like scot_pts<-unlist(as.data.frame(scotland$geometry)) it's not at all clear how I can get rid of the points I don't want as they don't seem to be listed in any easy way to find where one polygon stops and another starts I am wondering whether this approach is right anyway or whether there is some sf function which would allow me to identify the polygons I want - essentially the big one which is the mainland without lots of elaborate conversions and manipulations Any pointers, thoughts etc much appreciated Thanks Nick Wray [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
