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chloroex
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| # load libraries | |
| library(sf) | |
| library(maps) | |
| library(ggplot2) | |
| # 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 | |
| # map | |
| ggplot() + | |
| geom_sf(data = states, aes(fill = area)) + | |
| scale_fill_distiller(palette = 'Spectral') |
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