临时:setwd()
永久(RGui):http://f.dataguru.cn/thread-13684-1-1.html
:图解
验证.png
验证
永久(RStudio):http://bbs.pinggu.org/thread-1412336-1-1.html
Options -> General -> Default working directiory - select Browse and set the folder as your defualt working directory.