#install.packages("maps")
#install.packages("rworldmap")
library(rworldmap)
library(maps)
ddf = read.table(text="
country value
USA 10
UK 30
Peru 40
Spain 50
China 100
", header=T)
spdf <- joinCountryData2Map(ddf, joinCode="NAME", nameJoinColumn="country")
mapCountryData(spdf, nameColumnToPlot="value", catMethod="fixedWidth")
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