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
On 28 May 2017 at 17:37, Arne Henningsen 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
Not here:
R> a <- 1234568.01 + c(0:1)
R> a
[1] 1234568 1234569
R> summary(a)
Min. 1st Qu. Median Mean 3rd Qu. Max.
1234568 1234568 1234569 1234569 1234569 1234569
R> Sys.info()
sysname
"Linux"
release
"4.8.0-39-generic"
version
"#42-Ubuntu SMP Mon Feb 20 11:47:27 UTC 2017"
nodename
"max"
machine
"x86_64"
login
"edd"
user
"edd"
effective_user
"edd"
R>
Ubuntu 16.10, 64bit.
Dirk
| 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 at r-project.org mailing list
| https://stat.ethz.ch/mailman/listinfo/r-devel
--
http://dirk.eddelbuettel.com | @eddelbuettel | edd at debian.org
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.henningsen at 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 at 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.Meys at Ugent.be ------------------------------- Disclaimer : http://helpdesk.ugent.be/e-maildisclaimer.php [[alternative HTML version deleted]]
Might this be related to the Linux version? I'm testing on one of our university servers, and they tend to be deprived of regular updates sometimes... (Dirk, sorry for sending you this twice.)> Sys.info()sysname "Linux" release "3.16.0-4-amd64" version "#1 SMP Debian 3.16.7-ckt11-1 (2015-05-24)" nodename "ourServer" machine "x86_64" login "me" user "me" effective_user "me" On Sun, May 28, 2017 at 5:51 PM, Dirk Eddelbuettel <edd at debian.org> wrote:> > On 28 May 2017 at 17:37, Arne Henningsen 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 > > Not here: > > R> a <- 1234568.01 + c(0:1) > R> a > [1] 1234568 1234569 > R> summary(a) > Min. 1st Qu. Median Mean 3rd Qu. Max. > 1234568 1234568 1234569 1234569 1234569 1234569 > R> Sys.info() > sysname > "Linux" > release > "4.8.0-39-generic" > version > "#42-Ubuntu SMP Mon Feb 20 11:47:27 UTC 2017" > nodename > "max" > machine > "x86_64" > login > "edd" > user > "edd" > effective_user > "edd" > R> > > Ubuntu 16.10, 64bit. > > Dirk > > | 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 at r-project.org mailing list > | https://stat.ethz.ch/mailman/listinfo/r-devel > > -- > http://dirk.eddelbuettel.com | @eddelbuettel | edd at debian.org > > ______________________________________________ > R-devel at 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.Meys at Ugent.be ------------------------------- Disclaimer : http://helpdesk.ugent.be/e-maildisclaimer.php [[alternative HTML version deleted]]