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+I have done some work after Course 4 (Exploratory Data Analysis) that might interest someone, or be useful in future implementations of the course.
+
+This work consists of two simple functions that do some 'quick and dirty' EDA plots of air pollution, given a state/county code combo in the US. 
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+GitHub repo with this work: 
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+https://github.com/BigBangData/ExploratoryDataAnalysis