[R-sig-Geo] ReadShapePoly subsetting data

Peter Larson pslarson2 at gmail.com
Mon May 31 04:53:30 CEST 2010


It doesn't seem to work. This what I have though.

I have a STATE_NAME variable in the data that I could potentially use, 
assuming I know the write syntax.

Any ideas?

Thanks!

Pete

nc_file <- system.file("/LynchingHotSpots.shp", package="maptools")[1]
llCRS <- CRS("+proj=longlat +datum=NAD27")
nc <- readShapePoly("LynchingHotSpots.shp",  proj4string=llCRS)

statesWanted <- c("MN","WI")

nc <- nc[nc$STATE_NAME %in% statesWanted,]


print(spplot(nc, c("Lynchings")))



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