R安装包问题

源自：2-3 包

> install.packages("caret")

Warning in install.packages :

'lib = "C:/Program Files/R/R-3.3.1/library"' is not writable

Error in install.packages : unable to install packages

出现以上问题是什么原因？求帮忙

提问者：慕粉4040338 2016-10-01 16:50