[Rd] Strange behavior of C compiled program

[Mathieu Ribatet]

Hi Christophe,

The problem might be that you used %d when printing. I guess that your
variables dist and tmp are double so you have to use %f instead.

Best,
Mathieu

Le dimanche 08 février 2009 à 23:37 +0100, Christophe Genolini a écrit :
> Hi the list,
> 
> I need to include some C code in R, but the behavior of the C code is 
> strange : Here is my code :
> --- 8< ---
>     Rprintf("\n XXXX mTraj=%f 
> mClus=%f",mTraj[i+nbId*c],mClustersCenter[j+nbClusters*c]);
> 
>     Rprintf("\nDistA=%d Tmp=%d",dist,tmp);
>             tmp = mTraj[i+nbId* c] - mClustersCenter [j+nbClusters* c];
> 
>     Rprintf("\nDistB=%d Tmp=%d",dist,tmp);
>             dist += (tmp * tmp);
> 
>     Rprintf("\nDistC=%d Tmp=%d",dist,tmp);
> --- 8< ----
> 
> Herer are the stranges results it gives :
> 
> XXXX mTraj=1.000000 mClus=3.000000
> DistA=0 Tmp=0
> DistB=0 Tmp=0
> DistC=0 Tmp=1074790400
> 
> I ask on a C chat, but no one can answer me.
> Any idea of what wrong ?
> 
> Thanks
> Christophe
> 
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
-- 
Institute of Mathematics
Ecole Polytechnique Fédérale de Lausanne
STAT-IMA-FSB-EPFL, Station 8
CH-1015 Lausanne   Switzerland
http://stat.epfl.ch/
Tel: + 41 (0)21 693 7907