Hi Laura,

Storing your functions as a personal R package is actually the best way to go. Here is some documentation of people who've done just that:

http://kbroman.org/steps2rr/pages/packages.html (the entire page http://kbroman.org/steps2rr/ has a pretty good no-nonsense approach that you can follow along)

http://hilaryparker.com/2013/04/03/personal-r-packages/ (a good note of how the personal R package was on GitHub and how it was used as an R library).

So you can have your R functions up on GitHub in your own project and use it easily as mentioned in the second link.

Regards,

Jon