R example

[mathieuboudreau]

I have no experience in R, but it would be valuable to have an example using it.

It would be need stored in a branch simply called "r" or "rlanguage"

Resources:

https://www.r-bloggers.com/unit-testing-with-r/
https://katherinemwood.github.io/post/testthat/
https://journal.r-project.org/archive/2011-1/RJournal_2011-1_Wickham.pdf
https://cran.r-project.org/web/packages/RUnit/vignettes/RUnit.pdf