美国大陆各州的 R 向量

如何解决美国大陆各州的 R 向量

我在创建地图时为美国大陆的所有州写了一个矢量，这样就没有人需要再次手动执行此操作了。如果只想映射美国大陆，这对于像 Tigris 这样的包很重要。请参阅下文。有没有更有效的方法来做到这一点？

library(tigris)

allstates <- states(cb = TRUE) #this loads tigris 

allstates <- allstates %>% filter(
NAME == "Alabama" |NAME == "Arizona" |NAME == "Arkansas" | 
NAME == "California" | NAME == "Colorado" | NAME == "Connecticut" |NAME == "Delaware" |
NAME == "Florida" | NAME =="Georgia" |  NAME =="Idaho" |
NAME =="Illinois" |NAME =="Indiana" |NAME =="Iowa" |NAME =="Kansas" |
NAME =="Kentucky" |NAME =="Louisiana" |NAME =="Maine" |NAME =="Maryland" |
NAME =="Massachusetts" |NAME =="Michigan" |NAME =="Minnesota" |NAME =="Mississippi" |
NAME =="Missouri" |NAME =="Montana" |NAME =="Nebraska" |NAME =="Nevada" |
NAME =="New Hampshire" |NAME =="New Jersey" |NAME =="New Mexico" |NAME =="New York" |
NAME =="north Carolina" |NAME =="north Dakota" |NAME =="Ohio" |NAME =="Oklahoma" |
NAME =="Oregon" |NAME =="Pennsylvania" |NAME =="Rhode Island" |NAME =="South Carolina" |
NAME =="South Dakota" |NAME =="Tennessee" |NAME =="Texas" |NAME =="Utah" |NAME =="Vermont" |
NAME =="Virginia" | NAME =="Washington" | NAME =="West Virginia" | NAME =="Wisconsin" | 
NAME =="Wyoming" )```

解决方法

我们可以使用 %in% 代替 == 和 |

library(dplyr)
allstates_sub <- allstates %>%
       filter(NAME %in% state.name)