This is nothing to do with integers: 1e18 and 11 are doubles here.
It is a result of rounding error: 1e18/11 is not representable accurately,
and this should have been a warning to you that your calculations were
unreasonable.
The C code is
double myfmod(double x1, double x2)
{
double q = x1 / x2;
return x1 - floor(q) * x2;
}
We can improve the answer, but what you are doing is fundamentally flawed
and it is hard to detect whether rounding error has affected this. A
warning rather than an error seems appropriate.
If you really want to do things like this, try the gmp package (which
seems to give the wrong answer here) or a more appropriate calculator.
On Thu, 9 Dec 2004 [EMAIL PROTECTED] wrote:
> R Developers,
>
> 1000000000000000000 %% 11
> [1] -32
>
> I now understand that integers cannot be larger than
> .Machine$integer.max, but because the above produces a result than is
> patently wrong instead of an error, I'm reporting this as a bug.
--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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