Weird, because the output of Windows is actually correct. The exact mean of a is 1234568.51, which rounds to 1234569.
I can reproduce the Windows output on a Windows machine. My Debian server has R 3.3.1 , and there I can reproduce your output using: > summary(a, digits = 8) Min. 1st Qu. Median Mean 3rd Qu. Max. 1234568 1234568 1234568 1234568 1234569 1234569 > sessionInfo() R version 3.3.1 (2016-06-21) Platform: x86_64-pc-linux-gnu (64-bit) Running under: Debian GNU/Linux 8 (jessie) locale: [1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C [3] LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8 [5] LC_MONETARY=en_US.UTF-8 LC_MESSAGES=en_US.UTF-8 [7] LC_PAPER=en_US.UTF-8 LC_NAME=C [9] LC_ADDRESS=C LC_TELEPHONE=C [11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C attached base packages: [1] stats graphics grDevices utils datasets methods base On Sun, May 28, 2017 at 5:37 PM, Arne Henningsen <arne.henning...@gmail.com> wrote: > Dear all > > I am happy that summary.default() no longer rounds since R 3.4.0. > > However, in R 3.4.0, in a few cases, print.summaryDefault() rounds the > mean value (and the median value) differently on my GNU/Linux machine > and on my colleague's MS-Windows machine. Here is a small (simplified) > reproducible example: > > R> a <- 1234568.01 + c(0:1) > R> summary(a) > > Output on MS-Windows (expected rounding of the mean value): > Min. 1st Qu. Median Mean 3rd Qu. Max. > 1234568 1234568 1234569 1234569 1234569 1234569 > > Output on GNU/Linux (unexpected rounding of the mean value): > Min. 1st Qu. Median Mean 3rd Qu. Max. > 1234568 1234568 1234568 1234568 1234569 1234569 > > The following code gives the same output on MS-Windows and on GNU/Linux: > R> print(summary(a), digits=9) > Min. 1st Qu. Median Mean 3rd Qu. Max. > 1234568.0 1234568.3 1234568.5 1234568.5 1234568.8 1234569.0 > R> summary(a)["Mean"] > Mean > 1234569 > R> mean(a) > [1] 1234569 > R> print(mean(a), digits=9) > [1] 1234568.51 > > Can these outputs be reproduced by other GNU/Linux and MS-Windows users? > > If these differences can be reproduced by others: Should these > differences in the output on GNU/Linux and MS-Windows be considered as > a bug? > > Does anybody know how one can avoid to get different roundings in the > outputs of summary() on different computers? > > Best, > Arne > > -- > Arne Henningsen > http://www.arne-henningsen.name > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > -- Joris Meys Statistical consultant Ghent University Faculty of Bioscience Engineering Department of Mathematical Modelling, Statistics and Bio-Informatics tel : +32 (0)9 264 61 79 joris.m...@ugent.be ------------------------------- Disclaimer : http://helpdesk.ugent.be/e-maildisclaimer.php [[alternative HTML version deleted]] ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
