>>>>> "pd" == peter dalgaard
>>>>> on Thu, 24 Oct 2024 11:00:25 +0200 writes:
pd> This is probably Apple Silicon specific, not OSX per se:
>> sum(rep(1 / 9, 9)) - 1
pd> [1] 0
>> On 23 Oct 2024, at 07:26 , Stevie Pederson
>> <stephen.pederson...@gmail.com> wrote:
>>
>> sum(rep(1 / 9, 9)) - 1 # [1] 2.220446e-16
But indeed, it *is* a bug *always* to assume that double
precision arithmetic is exact be it in R or not
(unless you *know* that all the numbers involved are of the form
<integer> * 2^k ; k in "around" (-1000):1000 )
Martin Maechler
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide https://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
