Hi Reza,

I wrote a simple function that creates choropleths in R. You can check out
the code on my github repos and some documentation on this post.

Github repos:
https://github.com/darribas/darribas-R-tools/blob/master/choropleth.r
Blog post w/ docs:
http://dreamessenceonthemove.wordpress.com/2010/07/31/choropleths-in-r/<http://dreamessenceonthemove.wordpress.com/2010/07/31/choropleths-in-r/>

Hope it helps,

]d[

-- 
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Daniel Arribas-Bel, PhD.
Url: darribas.org
Mail: darribas@asu.edu

GeoDa Center for Geospatial Analysis and Computation (geodacenter.asu.edu)
Arizona State University (USA)
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