I'm trying to learn how to use TeX within R. I've downloaded R, RStudio, and proTeXt. When I try to compile it, I receive a message that I am missing several packages; however, when I try to find a repository (change repository > packages shall be installed from the internet) instead of pulling up the list of different internet repositories I get nothing--it gives me no repositories to choose from.
I have spent hours searching the internet, but I can't seem to find a way to install the packages.
I did see and follow the instructions of this question but it I couldn't get my computer to find the downloads and recognize a folder as a repository.