[Rd] .C clarification
Prof Brian Ripley
ripley at stats.ox.ac.uk
Sat Mar 3 18:29:21 CET 2012
On 03/03/2012 13:42, Terry Therneau wrote:
> Does .C duplicate unnecessary arguments? For instance
> fit<- .C("xxx", as.integer(n), x, y, z=double(15))
> The first and fourth arguments would have NAMED = 0. Is my guess that .C
> won't make yet one more (unnecessary) copy correct?
.C's internals (do_dotcode) does not know about NAMED. It duplicates
Use .Call if you want to control duplication.
> (Just trying to understand).
> Terry T
> R-devel at r-project.org mailing list
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
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