安装的是Rstudio 0.96.300。
check for updates,弹出框显示all packages are up to date.但是console显示
Warning: unable to access index for repository http://cran.csdb.cn/bin/windows/contrib/2.15
Warning: unable to access index for repository http://www.stats.ox.ac.uk/pub/RWin/bin/windows/contrib/2.15
请问如何处理。