[R] smooth scatterplot and geo map

[marco]

Hello everybody,
I'm trying to understand how to draw a smoothed scatterplot on a geographic
map with R.
Have a dataframe with point locations (long, lat) and was able to simply
plot these points on a shp map by using the maptools package. However,
instead of having simply the raw points on the map, I would like to have a
"smoothed" scatterplot of the same superimposed on the map. Tried with the
smoothScatter function, but really have no idea how to combine the map with
the resulting graph.
tx in adv
marco

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