[R-sig-Geo] Graph of attribute per postal code

[Isa-May Kennes]

Dear all,


I am quite new to R and have a question related to making graphs based on postal codes.

I have a dateset in which each element has a postal code in Belgium, dataset$zip. There are some other attributes like the exposure in days, dataset$exposure.

I would like to make a plot of the map of Belgium, with for different ranges of exposures different colors per postal code. It could for example resemble something like this (not the upper right graph):

[http://www.eurosurveillance.org/images/dynamic/EE/V20N01/Hens_fig2.png]


How can I achieve this?


Thanks in advance,

Bestregards,

Isa-May

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