Re: [Rd] Strange behavior of C compiled program

From: Mathieu Ribatet <mathieu.ribatet_at_epfl.ch>
Date: Sun, 08 Feb 2009 23:52:30 +0100

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

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