[Rd] Getting param names of primitives
maechler at stat.math.ethz.ch
Wed Jul 11 12:28:57 CEST 2007
>>>>> "BDR" == Prof Brian Ripley <ripley at stats.ox.ac.uk>
>>>>> on Wed, 11 Jul 2007 05:48:56 +0100 (BST) writes:
BDR> gives what formals(log) used to.
(I knew). I've been asking myself several times now,
if we should not make
formals() do this automatically.
I know that the change might break some code
which has used things like
## treat fun as a primitive function
but I think R has provided is.primitive(.)
long enough now so that
we could consider the change.
BDR> On Wed, 11 Jul 2007, miguel manese wrote:
>> In the latest R this does not work anymore
>> args <- formals(log)
>> because log is primitive. Is there any other way to get the argument
>> list? I just need the name of the parameter to display some error
>> message about it. I have looked at args() but I can't find anything to
>> extract the argument names from it.
>> M. Manese
BDR> Brian D. Ripley, ripley at stats.ox.ac.uk
BDR> Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
BDR> University of Oxford, Tel: +44 1865 272861 (self)
BDR> 1 South Parks Road, +44 1865 272866 (PA)
BDR> Oxford OX1 3TG, UK Fax: +44 1865 272595
BDR> R-devel at r-project.org mailing list
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