Here are some helpful R resources

Calculating and adding error bars

Whenever I find myself trying to calculate standard error (or other things) and add error bars to something with multiple factors or groups at play, I find myself eventually googling to this stellar page, which has a handy function at the bottom called summarySE(). (I do note that this is a bit outdated and relies on plyr as written, which may cause problems if you’re using dplyr. So if you hit any snags, maybe check that out first.)

That’s all I have in mind at the moment, but now that this page is here, hopefully I’ll add more as I come across them 🙂