Hi, It's hard to know without any reproducible code, but you will want to pay close attention to the value of the na.rm argument to raster::extract(Raster,SpatialPolygons)
See ?extract for all the details. Cheers, Ben > On May 16, 2018, at 2:27 PM, João Carreiras <jmbcarrei...@gmail.com> wrote: > > Greetings! > > I'm using the extract command (raster package) with a raster layer (x) > and a spatial polygons dataframe (y). I'm using it to extract the sum > of raster values by each spatial polygon. However, I'm getting NAs as > a result for some polygon IDs, which I know isn't true because that > doesn't happen in ArcGIS. > > Does anyone experienced the same issue? > > Thanks! > Joao > > _______________________________________________ > R-sig-Geo mailing list > R-sig-Geo@r-project.org > https://stat.ethz.ch/mailman/listinfo/r-sig-geo > Ben Tupper Bigelow Laboratory for Ocean Sciences 60 Bigelow Drive, P.O. Box 380 East Boothbay, Maine 04544 http://www.bigelow.org Tick Forecasting: https://eco.bigelow.org/ [[alternative HTML version deleted]] _______________________________________________ R-sig-Geo mailing list R-sig-Geo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo
