我想将我当前的R版本2.15.1升级到Debian wheezy的最新版R，我尝试了以下步骤，但不幸的是我没有成功。 Step1：我在＆＃34; /etc/apt/sources.list
结尾添加了以下两行deb http://cran.revolutionanalytics.com/bin/linux/debian wheezy-cran3/
deb-src http://cran.revolutionanalytics.com/bin/linux/debian wheezy-cran3/
然后我在终端上运行这些命令：
gpg --keyserver pgpkeys.mit.edu --recv-key 06F90DE5381BA480
gpg -a --export 06F90DE5381BA480 |sudo apt-key add
最后运行：
apt-get update
aptitude -t wheezy-cran3 install r-base r-base-dev
但我得到以下错误：
Ign ftp://ftp.mpi-sb.mpg.de wheezy/non-free Translation-en
Fetched 162 kB in 8s (19.0 kB/s)
W: Failed to fetch http://cran.revolutionanalytics.com/bin/linux/debian/wheezy-cran3/Sources 301 Moved Permanently
W: Failed to fetch http://cran.revolutionanalytics.com/bin/linux/debian/wheezy-cran3/Packages 301 Moved Permanently
E: Some index files failed to download. They have been ignored, or old ones used instead.
lap-97-35:/etc/apt# aptitude -t wheezy-cran3 install r-base r-base-dev
E: The value 'wheezy-cran3' is invalid for APT::Default-Release as such a release is not available in the sources
E: The value 'wheezy-cran3' is invalid for APT::Default-Release as such a release is not available in the sources
有人可以帮我解决这个问题吗？