Hello everyone,

I'll teach an "avanced" R course for my doctoral school in a month now.

I want to dedicate at least one session (out of 9 or 10) to base R.

Obviously, a part will be about the different accessors.

Yet, I also want to present some useful R base functions. Note that I don't want to talk about functions like `subset`

or `transform`

because we will use dplyr instead for this kind of operations.

Yet, I remember the first time I discovered the `match`

function, I found it very useful and now use it very often. There are some other functions like this one that deserve to be known, for example `sub`

, `cut`

, `split`

, `outer`

..

A complete list of R base functions is available there.

So, here my question is: **do you know some other R base functions that are super useful and should therefore be mentioned in my course to come?**