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getZipPop returns a data frame of zipcodes and their population where the zip codes fall within a given radius for use in choroplethrZip
getZipPop(zipcode, radius)
the reference zip code of which you'd like the list of zip codes within a give radius as character
the distance in miles from the center of the given zip to the center of the other zips as numeric
# NOT RUN { getStates("30316", 10) # }
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