Read R FAQ 7.31 ? http://cran.r-project.org/doc/FAQ/R-FAQ.html#Why-doesn_0027t-R-think-these-numbers-are-equal_003f
Gabor On Fri, Mar 21, 2008 at 04:17:28PM +0100, John Lande wrote: > dear all, > > I report a problem very simple, that I does non know how to handle. > > look at the following code: > > > a = rep(16.256, 5) > > sum(a[1:5]^2) - (sum(a[1:5])^2/5) > [1] 2.273737e-13 > > as you can see i retrieve a non 0 value, when i am expected to. what can I > do? > > > sessionInfo() > R version 2.6.2 (2008-02-08) > i386-pc-mingw32 > > locale: > LC_COLLATE=Italian_Italy.1252;LC_CTYPE=Italian_Italy.1252;LC_MONETARY=Italian_Italy.1252;LC_NUMERIC=C;LC_TIME=Italian_Italy.1252 > > attached base packages: > [1] stats graphics grDevices utils datasets methods base > > loaded via a namespace (and not attached): > [1] rcompgen_0.1-17 > > [[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. -- Csardi Gabor <[EMAIL PROTECTED]> UNIL DGM ______________________________________________ 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.
