[Rd] Rounding in print.summaryDefault()
Arne Henningsen
arne.henningsen at gmail.com
Sun May 28 19:15:09 CEST 2017
Thanks for all your responses. The issue seems to be more complex than
I thought. Here is the output of Sys.info() and sessionInfo() on my
GNU/Linux machine (Ubuntu 16.04.02 LTS):
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 1234568 1234568 1234569 1234569
R> Sys.info()
sysname
"Linux"
release
"4.5.0-040500rc6-generic"
version
"#201602281230 SMP Sun Feb 28 17:33:02 UTC 2016"
nodename
"arne-HP-EB-8560w"
machine
"x86_64"
login
"arne"
user
"arne"
effective_user
"arne"
R> sessionInfo()
R version 3.4.0 (2017-04-21)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 16.04.2 LTS
Matrix products: default
BLAS: /usr/lib/atlas-base/atlas/libblas.so.3.0
LAPACK: /usr/lib/atlas-base/atlas/liblapack.so.3.0
locale:
[1] LC_CTYPE=en_GB.UTF-8 LC_NUMERIC=C
[3] LC_TIME=da_DK.UTF-8 LC_COLLATE=en_GB.UTF-8
[5] LC_MONETARY=da_DK.UTF-8 LC_MESSAGES=en_GB.UTF-8
[7] LC_PAPER=en_GB.UTF-8 LC_NAME=C
[9] LC_ADDRESS=C LC_TELEPHONE=C
[11] LC_MEASUREMENT=da_DK.UTF-8 LC_IDENTIFICATION=C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
loaded via a namespace (and not attached):
[1] compiler_3.4.0 tools_3.4.0
/Arne
On 28 May 2017 at 17:58, Joris Meys <jorismeys at gmail.com> wrote:
> 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
--
Arne Henningsen
http://www.arne-henningsen.name
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