[Rd] bug in rank(), order(), is.unsorted() on character vector

[Rainer M Krug]

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On 07/12/11 15:48, Joris Meys wrote:
> @Barry : regardless of whether '_' comes before or after '1' , it 
> should be consistent. Adding an 'a' shouldn't shift '_' from
> before '1' to between '1' and '2', that's clearly an error. The
> help files are not stating anything about that. The only thing I
> can imagine, is that '_' gets ignored (in that case 19a would rank
> before 1a).
> 
> This said, I can't reproduce.

I can:

> x <- c("_1_", "1_9", "2_9") xa <- paste(x,'a',sep='') rank(x)
[1] 1 2 3
> rank(xa)
[1] 2 1 3
> sessionInfo()
R version 2.14.0 (2011-10-31)
Platform: i686-pc-linux-gnu (32-bit)

locale:
 [1] LC_CTYPE=en_GB.UTF-8       LC_NUMERIC=C
 [3] LC_TIME=en_GB.UTF-8        LC_COLLATE=en_GB.UTF-8
 [5] LC_MONETARY=en_GB.UTF-8    LC_MESSAGES=en_GB.UTF-8
 [7] LC_PAPER=C                 LC_NAME=C
 [9] LC_ADDRESS=C               LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_GB.UTF-8 LC_IDENTIFICATION=C

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base
> version
               _
platform       i686-pc-linux-gnu
arch           i686
os             linux-gnu
system         i686, linux-gnu
status
major          2
minor          14.0
year           2011
month          10
day            31
svn rev        57496
language       R
version.string R version 2.14.0 (2011-10-31)
> 

Interesting.

Rainer


> 
>> x <- c("_1_", "1_9", "2_9") xa <- paste(x,'a',sep='') rank(x)
> [1] 1 2 3
>> rank(xa)
> [1] 1 2 3
> 
>> sessionInfo()
> R version 2.14.0 Patched (2006-00-00 r00000) Platform:
> i386-pc-mingw32/i386 (32-bit)
> 
> locale: [1] LC_COLLATE=English_United States.1252
> LC_CTYPE=English_United States.1252    LC_MONETARY=English_United
> States.1252 [4] LC_NUMERIC=C
> LC_TIME=English_United States.1252
> 
> attached base packages: [1] grDevices datasets  splines   graphics
> stats     tcltk     utils methods   base
> 
> other attached packages: [1] svSocket_0.9-51 TinnR_1.0.3
> R2HTML_2.2      Hmisc_3.8-3 survival_2.36-9
> 
> loaded via a namespace (and not attached): [1] cluster_1.14.1
> grid_2.14.0     lattice_0.19-33 svMisc_0.9-63 tools_2.14.0
> 
> 
> 2011/12/7 Hervé Pagès <hpages at fhcrc.org>:
>> Hi,
>> 
>> This looks OK:
>> 
>>> x <- c("_1_", "1_9", "2_9") rank(x)
>> [1] 1 2 3
>> 
>> But this does not:
>> 
>>> xa <- paste(x, "a", sep="") xa
>> [1] "_1_a" "1_9a" "2_9a"
>>> rank(xa)
>> [1] 2 1 3
>> 
>> Cheers, H.
>> 
>>> sessionInfo()
>> R version 2.14.0 (2011-10-31) Platform: x86_64-unknown-linux-gnu
>> (64-bit)
>> 
>> locale: [1] LC_CTYPE=en_CA.UTF-8       LC_NUMERIC=C [3]
>> LC_TIME=en_CA.UTF-8        LC_COLLATE=en_CA.UTF-8 [5]
>> LC_MONETARY=en_CA.UTF-8    LC_MESSAGES=en_CA.UTF-8 [7] LC_PAPER=C
>> LC_NAME=C [9] LC_ADDRESS=C               LC_TELEPHONE=C [11]
>> LC_MEASUREMENT=en_CA.UTF-8 LC_IDENTIFICATION=C
>> 
>> attached base packages: [1] stats     graphics  grDevices utils
>> datasets  methods   base
>> 
>> loaded via a namespace (and not attached): [1] tools_2.14.0
>> 
>> 
>> -- Hervé Pagès
>> 
>> Program in Computational Biology Division of Public Health
>> Sciences Fred Hutchinson Cancer Research Center 1100 Fairview
>> Ave. N, M1-B514 P.O. Box 19024 Seattle, WA 98109-1024
>> 
>> E-mail: hpages at fhcrc.org Phone:  (206) 667-5791 Fax:    (206)
>> 667-1319
>> 
>> ______________________________________________ 
>> R-devel at r-project.org mailing list 
>> https://stat.ethz.ch/mailman/listinfo/r-devel
> 
> 
> 


- -- 
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation
Biology, UCT), Dipl. Phys. (Germany)

Centre of Excellence for Invasion Biology
Stellenbosch University
South Africa

Tel :       +33 - (0)9 53 10 27 44
Cell:       +33 - (0)6 85 62 59 98
Fax :       +33 - (0)9 58 10 27 44

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email:      Rainer at krugs.de

Skype:      RMkrug
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