R help - Jun 2021 - interactively getting alist of functions for a given package?

On 23/06/2021 8:37 a.m., Greg Minshall wrote:
> hi.
> 
> at the R prompt, i often hit, e.g., "data.table::<TAB>", to
try to find
> a routine in a give package.
> 
> however, some packages have a *lot* of functions (i'm looking at *you*,
> ggplot2...), so if i know the routine name starts with, e.g.,
"set", i
> can filter the returned list of routines by typing
> "data.table::set<TAB>" to get a list of completions.
> 
> but, what if i know the name *contains*, but doesn't start with,
"set"?
> 
> is there an obvious way to find this?  something like the unix-y
> : ls /bin | grep -i "set"
Bert gave you an answer that depends on ls().  Whether there's something 
like "set<TAB>" that can return "asset" probably
depends on your front
end, and may be customizable using the facilities described in ?rcompgen.

Duncan Murdoch

RStudio seems to have done this. If you have it, try typing

ggplot2::line

and the popup will suggest (among other options) geom_line.

On June 23, 2021 10:10:07 AM PDT, Duncan Murdoch <murdoch.duncan at
gmail.com> wrote:
>On 23/06/2021 8:37 a.m., Greg Minshall wrote:
>> hi.
>> 
>> at the R prompt, i often hit, e.g.,
"data.table::<TAB>", to try to
>find
>> a routine in a give package.
>> 
>> however, some packages have a *lot* of functions (i'm looking at
>*you*,
>> ggplot2...), so if i know the routine name starts with, e.g.,
"set",
>i
>> can filter the returned list of routines by typing
>> "data.table::set<TAB>" to get a list of completions.
>> 
>> but, what if i know the name *contains*, but doesn't start with,
>"set"?
>> 
>> is there an obvious way to find this?  something like the unix-y
>> : ls /bin | grep -i "set"
>
>Bert gave you an answer that depends on ls().  Whether there's
>something 
>like "set<TAB>" that can return "asset" probably
depends on your front
>end, and may be customizable using the facilities described in
>?rcompgen.
>
>Duncan Murdoch
>
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Duncan,
> Bert gave you an answer that depends on ls().  Whether there's
> something like "set<TAB>" that can return "asset"
probably depends on
> your front end, and may be customizable using the facilities described
> in ?rcompgen.
thanks.  i am just using command line R on linux.  i tried setting
`rc.setting(fuzzy=TRUE, func=TRUE, ipck=TRUE)`, but
`data.table::set<TAB>` still only shows names that start with
"set".
Bert's `ls` answer works, but did you have an idea of how else this
might be made to work with rcompgen?

cheers, Greg