[R-sig-Geo] Spatialpolygonsdataframe

[Metastate Metastate]

Hi all,

I am starting to learn spatial analysis using R. Do anyone know if the
attribute data in a spatialpolygonsdataframe can contain multiple
observations within the same polygon? To be specific, I have a
spatialpolygonsdataframe that contain USA county polygons and the relevant
attribute data contains the relevant state,county and FIPs.  And I also
have another data-frame that contains weather features by year by county
(For example there are yearly average temperature for each county) . How
can I join the spatialpolygondataframe with the weather data so that the
resulted attribute table in the joint spatialpolygonsdataframe can contain
*multiple-year* weather features within each county?

Thank you very much for any kindly help.

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