*A question I’ve googled before without success. Hopefully this answer will show up for someone who needs it. I’ll also go over the better-known uses of *`?`

just in case.

- To get help in
`R`

about a function like `subset`

you type `?subset`

. That’s like `man subset`

from the command line.
- If you only know roughly what you’re looking for use double question marks: so
`??nonlinear`

will lead to the package `nlme`

. That’s like `apropos`

on the command line.
- To get a package overview, type
`?xts::xts`

. There does not exist `?xts`

help. Packages that don’t have `?twitteR::twitteR`

you will need to use `??twitteR`

to find the help pages on `?twitteR::status-class`

, `?twitteR::dmGet`

, etc.
- Finally, the question of the title.
**To get R help on punctuation such as **`(`

,` {`

, `[`

, ```

, `::`

,` ...`

,` +`

, and yes, even on `?`

itself, use single quotes to ‘escape’ the meaningful symbol. Examples follow:
`?'`'`

`?'('`

`?'['`

`?'...'`

`?'+'`

`?'%*%'`

`?'%x%'`

`?'%o%'`

`?'%%'`

`?'%/%'`

`?'$'`

`?'^'`

`?'~'`

`?'<-'`

`?'='`

`?'<<-'`

*Related*

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