[R] allocating memory in C, not in R

Prof Brian Ripley ripley at stats.ox.ac.uk
Wed Sep 1 23:16:59 CEST 2004

On Wed, 1 Sep 2004, S. Blay wrote:

> I need to retrieve several vectors of various types from a call 
> to .C(), but I don't know their length in advance. 
> Is there a way to do this without allocating an excessive amount 
> of memory? 
> If so, an example would be very helpful.

It would be very much easier to use .Call rather than .C.

Alternatively, generate and allocate in C on one C call and retrieve on a
second, as rpart does.

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)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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