johnmy 发表于 2016-8-23 22:04 
直接用devtools::install_github(包名字)在线安装?
不管点yes还是no 都会报
install_github("cran/randomForest")
Downloading GitHub repo cran/randomForest@master
from URL

https://api.github.com/repos/cran/randomForest/zipball/master
错误: Could not find build tools necessary to build randomForest