[R] Generating maps in R

From: Aleksandr Andreev <aleksandr.andreev_at_duke.edu>
Date: Sat, 29 Mar 2008 12:53:58 -0400


I am trying plot some data on a map in R. Here's the scenario.

I have a variable called probworkinghealthy which contains a predicted probability of employment for every individual in my sample (about 100,000 observations).
I have another variable, called a001ter, which contains the subject of residency in the Russian Federation (akin to a US state) for every individual in the sample.
I have a shape file with the boundaries of all the subjects, called russia.shp.

I can plot boxplots of the probability by Federal Subject using plot(probworkinghealthy ~ a001ter). I can also plot the map using plot(russia.shp)

Now, I would like to plot the mean probability of employment (i.e. mean(probworkinghealthy)) on a map of Russia using color coding all the Federal Subjects. Does anyone know how to do something like that?

Much appreciated,

Aleks Andreev
Duke University

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