choroplethrZip
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subtitle argument added (ggplot2)
ggplot2 subtitle argument enabled a la: library(choroplethr) library(choroplethrZip) data('df_pop_zip') zip_choropleth(df_pop_zip, state_zoom="New York", title="2012 New York State ZCTA Population Estimates", subtitle="Imagine a helpful subtitle here", legend = "Population")