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fawda123/tmapex

Created May 12, 2018 20:11
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tmapex
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tmapex
# load libraries
library(sf)
library(maps)
library(tmap)
# get states as sf
states <- st_as_sf(map('state', plot = F, fill = T))
# calculate area, add to states
area <- st_area(states)
area <- as.numeric(area) / 1e6
states$area <- area
# chloropleth from qtm function
qtm(states, fill = "area", text = "ID", fill.title = "State area (km2)", text.size='area') +
tm_layout(legend.outside = T)
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