[R] colname of ... arguments

[Claudia Beleites]

what about:

niceplot<-function(...) {
arg.names <- as.list (match.call () [-1])
for (a in seq_along (arg.names))
  cat (as.character (as.expression (arg.names [[a]])), "\n\n")
}

niceplot (greeneye, log (greeneye), 1:3)

note that this works also if there is no "greeneye"

Disclaimer: I don't know whether I'm suggesting something bad, but I'd like to 
learn about better ways. So I really appreciate comments.

Claudia

ManInMoon wrote:
> That is quite helpful David
> 
> niceplot<-function(...) {
>  parms=list(...)
>  for (x in parms) {
>  xname <- paste(deparse(substitute(x), 500), collapse = "\n")
>    cat(xname)
>  }
> }
> 
>> GreenEyes=c(1,2,3,4)
>> niceplot(GreenEyes)
> c(1, 2, 3, 4)
> 
> BUT what I want is:
>  > GreenEyes=c(1,2,3,4)
>> niceplot(GreenEyes)
> "GreenEyes"
> 
> I will use the vector for plotting too, but I need it's name to produce a
> legend automatically
> 
> 
> 
> 
> On 10 March 2010 23:32, David Scott-6 [via R] <
> ml-node+1588213-620034400-180445 at n4.nabble.com<ml-node%2B1588213-620034400-180445 at n4.nabble.com>
>> wrote:
> 
>> ManInMoon wrote:
>>
>>> I have writtn a function where I pass a variable number of arguments.
>>>
>>> I They are vectors and I can manipulate them, but I need to get hold of
>> the
>>> name for a legend.
>>>
>>> niceplot<-function(...) {
>>>    parms=list(...)
>>>
>>>   for (x in parms) {
>>>     DoSomethingWith(x)
>>>   }
>>>
>>> }
>>>
>>> BUT how how can I get something like namestring(...) of nameofvector(x)?
>>
>> I use the following syntax to get the name of a data object to use in a
>> title, label or whatever.
>>
>> xname <- paste(deparse(substitute(x), 500), collapse = "\n")
>>
>> This is taken from hist.default so at least has some provenance as an
>> appropriate method.
>>
>> David Scott
>>
>> --
>> _________________________________________________________________
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>>                 The University of Auckland, PB 92019
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> 


-- 
Claudia Beleites
Dipartimento dei Materiali e delle Risorse Naturali
Università degli Studi di Trieste
Via Alfonso Valerio 6/a
I-34127 Trieste

phone: +39 0 40 5 58-37 68
email: cbeleites at units.it