On Wed, May 13, 2009 at 02:35:12PM +0200, gos...@igmm.cnrs.fr wrote:
> I cannot explain why R seems to have problems adding two big numbers.
>
> sprintf("%f",10^4+10^19) gives "10010240.00"
> instead of "1001.00"
>
> problems seems to arriv
Full_Name: Gostan Thierry
Version: 2.6.1 (2007-11-26)
OS: Windows XP
Submission from: (NULL) (193.49.190.42)
I cannot explain why R seems to have problems adding two big numbers.
sprintf("%f",10^4+10^19) gives "10010240.00"
instead of "1001.00
gostan wrote:
>
> Full_Name: Gostan Thierry
> Version: 2.6.1 (2007-11-26)
> OS: Windows XP
> Submission from: (NULL) (193.49.190.42)
>
> I cannot explain why R seems to have problems adding two big numbers.
>
> sprintf("%f",10^4+10^19) gives "10010240.00"
>
Gostan,
This is not a bug. You're asking for 20 decimal digits of precision,
which is impossible with double-precision floating point arithmetic.
http://fr.wikipedia.org/wiki/Virgule_flottante
Best,
Josh
--
http://www.fosstrading.com
On Wed, May 13, 2009 at 7:35 AM, wrote:
> Full_Name: Gos
