无法运行map_data("state")
问题描述：
我试图在R中的美国地图上工作.我已经做了很多次，但是这次，当我尝试加载时，它给了我这个错误:
I am trying to work on a US map in R. I have done it a lot of times but this time it gives me this error when I try to load:
us<- map_data("state")
Error in .C(C_map_type, as.character(mapbase), integer(1)) :
Incorrect number of arguments (2), expecting 0 for ''
我已加载ggmap和ggplot2库.我要去哪里错了?
I have ggmap and ggplot2 libraries loaded. Where am I going wrong?
答
您需要与ggmap一起使用的地图"包.
You need the 'maps' package along with ggmap.
library(maps)
library(ggmap)
us<- map_data("state")
这应该有效