[R] Problem with C extension

Prof Brian Ripley ripley at stats.ox.ac.uk
Fri Jan 19 18:50:53 CET 2007

This is a programming question, and I am sending a solution to R-devel
(please see the posting guide).

On Fri, 19 Jan 2007, Markus Schmidberger wrote:

> Hello,
> I try to write an extension in C, to get a faster functions.
> Therefore I have to add an element (vector) to a vector. The command in
> R is very simple: x = c(x,a)
> But in C I have the problem to reallocate my vector for getting more
> space. Everything I tried, I get a "Segmentation fault".
> So, how can I combine two vectors in C and give the result back to R
> (return(x))?
> Thanks
> Markus Schmidberger

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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