On Jan 5, 2013, at 20:30 , Rolf Turner wrote: > On 01/06/2013 07:42 AM, David Arnold wrote: >> Hi, >> >> Can someone explain this: >> >>> options(digits=20) >>> 1/3 >> [1] 0.33333333333333331483 >> >> Why the 1483 at the end? > > There are 10 sorts of people; those who understand binary > arithmetic and those who don't. See also FAQ 7.31.
Actually, it seems there are 11 sorts; those who understand binary, those who understand floating point binary, and those who do neither. The first 0.010101010101010101... of these would seem to the the issue here. (Or 1.0101010101...e-10 if you want to split hairs.) -- Peter Dalgaard, Professor, Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Email: pd....@cbs.dk Priv: pda...@gmail.com ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
