Thursday, April 17, 2014

Nominal Area Choropleth Map

 
 
http://andrewgelman.com/2007/10/25/some_cool_graph/


Nominal area choropleth maps are created to provide nominal data over an area. 
Gender, occupation, ethnicity, race, are examples of nominal data because the order of the categories doesn't matter. The chart above shows the republican and democratic party of rich voters only.  This is nominal because the democratic and republican party have zero value.






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