我在UNIX服务器上使用R 3.2.2（这是安装到我的HOME）。
我尝试安装的任何软件包都会返回如下错误消息：
install.packages('knitr')
Warning: unable to access index for repository
https://cran.rstudio.com/src/contrib
Warning message:
package ‘knitr’ is not available (for R version 3.2.2)
我还尝试下载软件包源并手动安装，但这不起作用：
install.packages('/home/baker/knitr_1.11.tar.gz',repos= NULL,type='source')
ERROR: dependencies ‘evaluate’, ‘digest’, ‘formatR’, ‘highr’, ‘markdown’, ‘stringr’, ‘yaml’ are not available for package ‘knitr’
* removing ‘/home/baker/R/lib64/R/library/knitr’
Warning message:
In install.packages("/home/baker/knitr_1.11.tar.gz", repos = NULL, :
installation of package ‘/home/baker/knitr_1.11.tar.gz’ had non-zero exit status
这显然是一个令人沮丧的问题......任何想法？我完全失去了。