[R] what can one do with (to) '..." ?

[Comcast]

Inside your function that has a ... argument, you can get the optional arguments with :

Arg.dot <- list(...)

Section 2.1.5 of the R Language Definition which should be accessible from the help facility would appear to be sensible place to start. "Programming for Data Analysis" could also be purchased.
-- 
David

Sent from my iPhone

On Aug 15, 2011, at 6:47 PM, Carl Witthoft <carl at witthoft.com> wrote:

> I followed a couple threads from the archives and from stackoverflow.com, and would like to know: just what is "..."  ?  What I mean by this is,for example, from the point of view of a user running a function in debug mode,  is "..." an object, or does it exist in the current environment as some thingy?
> 
> Maybe a better question to ask is: if I were to write some function that accepts "..." for its own personal use, how do I access the optional arguments?   Do I simply have to do a series of 'match' or 'pmatch'  on the output of list(...) , or is there a more direct way to get at the variables?
> 
> If there is a R programmer's manual that discusses this, I'm happy to read that, so just let me know.
> 
> thanks
> Carl
> 
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