Hi,

I wonder if it is possible with the graphics package to overlay one or several plots
(barplots, for example) over a map. Data for the map is in a data frame with the
latitude and longitude coordinates, and then:

> plot(map$long, map$lat, type ="l")

produces the map. I want to put each barplot in specific locations on the map, namely
at the center of "statistical squares".

I´ve seen an example in Paul Murrell´s "R Graphics" book that seems appropriate
(grid package), but a bit complicated.

Thanks a lot for any advice.

Héctor

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Héctor Villalobos <hvillalo@ipn.mx>
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