我正在使用
尝试将R级（目前为3.1.3）改为最新版本sudo apt-get install r-base-dev
并收到我已经知道的消息：
Reading package lists... Done
Building dependency tree
Reading state information... Done
r-base-dev is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 5 not upgraded.
这是我当前的版本
R version 3.1.3 (2015-03-09) -- "Smooth Sidewalk"
Copyright (C) 2015 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)
所以我显然不是最新版本。