Sunday, April 14, 2013

RG#62: spartial buble plot


require(sp)

# data 

data(meuse)
coordinates(meuse) <- c("x", "y") # promote to SpatialPointsDataFrame

bubble(meuse, "zinc", maxsize = 2.5, main = "zic concentrations (ppm)", key.entries = 2^(-1:4))
 
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