Mapping Public Opinion: A Tutorial
At the upcoming 2012 summer meeting of the Society of Political Methodology, I will be presenting a poster on Isarithmic Maps of Public Opinion. Since last posting on the topic, I have made major improvements to the code and robustness of the modeling approach, and written a tutorial that illustrates the production of such maps.
This tutorial is in a very rough draft form, but I will post it here when it is finalized. (An earlier draft had some errors, and so I have taken it down.)

David, I have been following your work since I found your maps through a link. Congratulations on being linked at R-Bloggers. Can you write some posts on how you are using Bayesian probability in your research.
Reblogged this on Joscani’s Weblog and commented:
Excellent work by David B.Sparks
Hi David,
I have the data in which I have classified the US states in 3 classes. I want to color the state according to the class. Please help doing this.
I have done the similar exercise for countries usin “rworldmap”, but not able to do this for the US states.
Please help.
Many thanks.
I did a tutorial that do nearly the same as D. Sparks do, I think:
http://www.muon-stat.com/r/tutorial-isarithmic-maps-election-data/
http://www.muon-stat.com/r/tutorial-part-2-isarithmic-maps-of-election-data/
Great work David! Looking forward to that tutorial you mentioned, will it be up soon?
All the best, Rick
I’m leaving a comment just to be notified if it comes out here. ~ an avid is.R() reader