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2009-09-18T01:51:40.473
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2009-09-18T03:01:49.677
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There are many ways to do this in R (see the <a href="http://cran.r-project.org/web/views/Spatial.html" rel="noreferrer">spatial view</a>); many of these <a href="http://cran.r-project.org/web/packages/maps/index.html" rel="noreferrer">depend on the "maps" package</a>. <ul> <li>Check out this <a href="http://www.ai.rug.nl/~hedderik/R/US2004/" rel="noreferrer">cool example of the US 2004 election</a>. It ends up looking like this:<a href="http://www.ai.rug.nl/~hedderik/R/US2004/US04Election-PopGraded.png" rel="noreferrer">alt text http://www.ai.rug.nl/~hedderik/R/US2004/US04Election-PopGraded.png</a></li> <li>Here's a slightly ugly example of a model <a href="http://addictedtor.free.fr/graphiques/sources/source_146.R" rel="noreferrer">that uses the "maps" package with "lattice".</a></li> <li>Andrew Gelman made some very nice plots like this. See, for instance, <a href="http://www.stat.columbia.edu/~cook/movabletype/archives/2009/03/how_went_the_20.html" rel="noreferrer">this blog post on red states/blue states</a> and <a href="http://www.stat.columbia.edu/~cook/movabletype/archives/2009/05/discussion_and.html" rel="noreferrer">this follow up post</a>.</li> <li>Here's a very simple example <a href="http://cran.r-project.org/web/packages/gmaps/index.html" rel="noreferrer">using the "gmaps" package</a>, which shows a map of Arrests by state for arrests per 100,000 for Murder: <pre><code>require(gmaps) data(USArrests) attach(USArrests) grid.newpage() grid.frame(name="map") grid.pack("map",USALevelPlot(states=rownames(USArrests),levels=Murder,col.fun=reds),height=unit(1,'null')) grid.pack("map",gradientLegendGrob(at=quantile(Murder),col.fun=reds),side="bottom",height=unit(.2,'npc')) detach(USArrests) </code></pre></li> </ul>
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1. This table or related slice is empty.
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1. POPlotting color map with zip codes in R or Python
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1. USShane
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1. USShane
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1. COIt seems like these examples are at the county, not zipcode, level
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 USDan Goldstein

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