[Rd] code for sum function

[Tomas Kalibera]

See do_summary() in summary.c, rsum() for doubles. R uses long double 
type as accumulator on systems where available.

Best,
Tomas

On 2/14/19 2:08 PM, Rampal Etienne wrote:
> Hello,
>
> I am trying to write FORTRAN code to do the same as some R code I 
> have. I get (small) differences when using the sum function in R. I 
> know there are numerical routines to improve precision, but I have not 
> been able to figure out what algorithm R is using. Does anyone know 
> this? Or where can I find the code for the sum function?
>
> Regards,
>
> Rampal Etienne
>
> ______________________________________________
> R-devel using r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel