On Thu, Dec 30, 2004 at 04:27:59PM +0000, Prof Brian Ripley wrote: > On Thu, 30 Dec 2004, Thomas Lumley wrote: > > >On Thu, 30 Dec 2004, [iso-8859-1] Göran Broström wrote: > >> > >>However, and that is my question/suggestion: Why not use Calloc+Free > >>instead of R_alloc in vmmin (and maybe in other places)? I made the > >>changes in 'optim.c' in the functions 'vmmin' and 'Lmatrix'. Then I > >>rebuilt > >>and reinstalled R-2.0.1. The result was great! My function ran very fast > >>and > >>without any memory problems. > >> > >>So why not? Or will this change create other problems? > > > >Memory will leak permanently if the functions are interrupted or an error > >occurs. This may be less serious now than it was in the past, since R can > >be interrupted in fewer places. > > An error in the objective function would also cause a leak. Goran *should* > be managing the heap himself by vmax[gs]et, as discussed in Writing R > Extensions.
So Brian thinks of me as an expert?:-) In 'R-exts' I read about using vmax[gs]et: "This is only recommended for experts." Seriously, do you really suggest that amateurs like myself should ignore the written documentation? More seriously, how should I interpret the word 'expert' in the documentation? I always think of guys like Brian, Peter, Thomas, and the rest of the core team when I read warnings like that. And the consequence is that I automatically avoid such tricks. Maybe warnings should be written in such a way that they don't discourage from using the right tools? > So why not read the manual and use the documented mechanism? See above. I will try your suggestion and be an expert. Thanks, Göran -- Göran Broström tel: +46 90 786 5223 Department of Statistics fax: +46 90 786 6614 Umeå University http://www.stat.umu.se/egna/gb/ SE-90187 Umeå, Sweden e-mail: [EMAIL PROTECTED] ______________________________________________ R-devel@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-devel