Kay Pilz <[EMAIL PROTECTED]> writes: > Hello All. > > I am running R 2.0.0 with a Win XP operating system. The same problem occured > with R 1.9.1 but not with R.1.3.1 on a Win NT computer. > > My request is about the following problem with the sort function: ... > Taking the difference of the first two entries yields > > > s[1]-s[2] > [1] -2.220446e-16 > > which seems to be a numerical artefact. > > Is this a bug, or just a handling error by me?
You, I think. Consider for instance > x <- c(1.313,1.314,1.315,1.316) > diff(x) - 1e-3 [1] 1.118897e-16 -1.101549e-16 1.118897e-16 > sort(diff(x) - 1e-3) [1] -1.101549e-16 1.118897e-16 1.118897e-16 > diff(sort(diff(x) - 1e-3)[1:2]) [1] 2.220446e-16 -- O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
