问题描述
手头的任务是将 empprevyearpct 值映射到县地图。示例数据如下。
library(tidyverse)
library(tigris)
countyname <- c("Carson City","Churchill County","Clark County","Douglas County","Elko County","Esmeralda County","Eureka County","Humboldt County","Lander County","Lincoln County","Lyon County","mineral County","Nye County","Pershing County","Storey County","Washoe County","White Pine County")
prevyearpct <- c(.545,.541,.539,.401,.301,.201,.101,.001,.664,.604,.704,.123,.129,.130,.085,.015,.099)
data2 <- data.frame(countyname,prevyearpct)
NV_counties <- counties(32)
我不需要为我完成的工作。如果我要将 prevyearpct 值映射到县,我从哪里开始?我是否需要附加数据以使 NV_Counties 和 data2 成为一个合并项目?我已经阅读了很多文章/教程,但没有使用底格里斯河。
解决方法
您可以使用 geo_join()
将两个数据集连接在一起。之后,您可以使用 geom_sf()
将其映射出来(this guide 可能会有所帮助)。