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Requires ggplot2, plyr and the data frames lock, owid, citymap. Multiple, select frames are plotted.
corona_citymap(pdf = FALSE, FewCities = NULL, cols = 4)
= TRUE writes to PDF, default FALSE
a c() list of city names from the city options. Default is all.
Number of columns in output, default is 4
# NOT RUN { corona_citymap(cols=4); # }
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