[Rd] code for sum function
Tomas Kalibera
tom@@@k@||ber@ @end|ng |rom gm@||@com
Mon Feb 18 16:38:57 CET 2019
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
>
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