## Not run:
# xx <- readShapePoly(system.file("shapes/columbus.shp", package="maptools")[1])
# sp2Mondrian(xx, file="columbus1.txt")
# xx <- readShapePoly(system.file("shapes/sids.shp", package="maptools")[1])
# sp2Mondrian(xx, file="sids1.txt")
# ## End(Not run)
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