[R] deparseDots to get names of all arguments?

[Bert Gunter]

Duncan et.al:

Referring to my previous suggestion for f:

> f(log(x),x^2)
[1] "log(x)" "x^2"

Is this not what you want?

Cheers,
Bert


On Tue, Feb 20, 2018 at 4:00 PM, Duncan Murdoch <murdoch.duncan at gmail.com>
wrote:

> On 20/02/2018 5:47 PM, Rolf Turner wrote:
>
>> On 21/02/18 11:36, Spencer Graves wrote:
>>
>>> Hi, All:
>>>
>>>
>>>         How can I get the names of all the arguments in dots(...)?
>>>
>>>
>>>         I'm able to get the name of the first argument but not the
>>> second:
>>>
>>>
>>>
>>> deparseDots <- function(...){
>>>     deparse(substitute(...))
>>> }
>>> a <- 1
>>> b <- 2
>>> deparseDots(a, b)
>>> [1] "a"
>>>
>>>   >        I'd like to get c('a', 'b').
>>>
>>
>> Does
>>
>>       names(list(...))
>>
>> do what you want?
>>
>
> No, that does what he asked for, not what he wants :-).  Spencer, you want
> to deparse all of the expressions in ..., not their names.
>
> I think base R doesn't have a way to do this (but I may be wrong).  You
> can do it using some the rlang package.  For example, this seems to work:
>
> deparseDots <- function(...) {
>   unname(sapply(rlang::exprs(...), deparse))
> }
>
> Duncan Murdoch
>
>
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