The link to FAQ 7.31 is http://cran.r-project.org/doc/FAQ/R-FAQ.html#Why-doesn_0027t-R-think-these-numbers-are-equal_003f
Jean On Fri, Aug 9, 2013 at 8:16 AM, jim holtman <jholt...@gmail.com> wrote: > FAQ 7.31 is a start. > > Understand the "precision" of floating point numbers. You probably only > have about 15 digits (54 bits) of significance. > > If you need unlimited number of digits, there are some other alternatives. > > > > On Fri, Aug 9, 2013 at 5:54 AM, Johan Nyberg <jo...@infocraft.se> wrote: > > > I am confused about what I believed was artefects from reading .csv files > > with big numbers. > > Finally I checked using the console and this is what I get, the same as > > when importing: > > > > > >longnumber<-635024810560380000 > > >longnumber > > [1] 635024810560380032 > > > > I have tried setting "options(digits=22) and also 20 and 18 with no > > difference. R-version is x64 3.0.1 > > > > Does someone know or guess why this happens? > > > > Yours > > Johan Nyberg, Sweden. > > > > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > 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. > > > > > > -- > Jim Holtman > Data Munger Guru > > What is the problem that you are trying to solve? > Tell me what you want to do, not how you want to do it. > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. > [[alternative HTML version deleted]] ______________________________________________ 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.
