[R-sig-Geo] Best way to get values of a raster that are not masked?

[Mark Connolly]

Not sure exactly what you are starting with but something like 

# ?read.csv and look for information on as.is and na.strings
# depending on how clean the data are, you may want to bring them in
# as is and use as.numeric etc on the specific attributes
mixed = read.csv("filename.csv")

good = subset(mixed, testattrib == 1)[,c("x","y","dataattrib")]



If you already have some coordinates and want to join data frames
together ?base::merge (there is also a raster::merge)

Mark