找不到ggplot2这个包,也安装不了
> library(ggplot2) Error in library(ggplot2) : there is no package called ‘ggplot2’ Warning: unable to access index for repository https://cran.rstudio.com/src/contrib: cannot download all files 提示没有这个包怎么办?
> library(ggplot2) Error in library(ggplot2) : there is no package called ‘ggplot2’ Warning: unable to access index for repository https://cran.rstudio.com/src/contrib: cannot download all files 提示没有这个包怎么办?
2016-10-10
举报