I have a SpatialPolygonsDataFrame with $Species as a factor variable and with 22 levels of prey species. I would like R to only consider 16 of these species and delete the other 6.
Any suggestions? Nothing on Stack Overflow has worked.
I don't know if this will solve your problem but you can access the coordinates of a spacial polygon object by indexing it. So you extract the coordinates from the species you need and work with that.
map2 = readOGR(dsn = "path", "35MUE250GC_SIR")
coords.sp = map2@polygons[[i]]@Polygons[[1]]@coords #replace i for index
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