r 从凯尔沃克使用底格里斯拉多个地方

Posted 2021-05-24

library(tigris)

us_states <- unique(fips_codes$state)[1:51]

us_places <- rbind_tigris(
  lapply(
    us_states, function(x) {
      places(state = x, cb = TRUE)
    }
  )
)