Help please, I have been trying to download the package dplyr into my r studio but is unable to do so - maybe due to proxy, please help
error: Warning in install.packages : unable to access index for repository http://cran.rstudio.com/src/contrib: cannot open URL 'http://cran.rstudio.com/src/contrib/PACKAGES'
If your connection is behind a proxy server you need to set your credentials on startup. Take a look at this support article
I wrote this: Sys.setenv(http_proxy= "http://proxy.example.com:165.225.110.8:80/") but still cannot work
The environment variable has to be set on startup so I think you need to use a .Renviron file as explained in the support article I linked for you.
.Renviron
Also, it seems you are not setting your actual credentials and proxy address.