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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 likesubset
you type?subset
. That’s likeman 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 packagenlme
. That’s likeapropos
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%'
?'%%'
?'%/%'
?'$'
?'^'
?'~'
?'<-'
?'='
?'<<-'
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