Despite working on and off with R for about two years now, I can never seem to remember how to do basic things when I return to it after a few weeks away.

I recently started keeping detailed notes for myself to minimize how much time I spend figuring things out that I already learned about in the past.

You can check out my cheat sheet on GitHub here:

https://github.com/mattm/r-cheat-sheet

It covers everything from data frames to working with dates and times to using ggplot and a lot more. I’ll update it periodically as I add new notes.

If you spot any mistakes or have any suggestions for how to improve it, don’t hesitate to shoot me an email.