As the help says
The sort order for character vectors will depend on the collating
sequence of the locale in use: see ‘Comparison’.
and that ref says
Collation of
non-letters (spaces, punctuation signs, hyphens, fractions and so
on) is even more problematic.
That different OSes use the same name for a locale does not make them
the same locale.
Note that R can be compiled to use ICU, which provides a
well-considered collation suite. R on Mac OS X uses ICU, as does a
Linux build if it is available -- so I would say that it is RHEL that
is out of line here (it makes little sense to have < and > far apart
in the collation sequence).
Why did you report a documented difference as a bug?
On Mon, 21 Dec 2009, jeffr...@rand.org wrote:
Full_Name: Jeffrey Sullivan
Version: 2.10
OS: Mac
Submission from: (NULL) (130.154.0.250)
Sort produces different results when sorting strings with non-alphanumeric
characters, depending on the operating system:
RHEL 5.2, R 2.10.0
-------------
v <- c("1","<0",">3","2")
Sys.setlocale("LC_COLLATE","en_US.UTF-8")
[1] "en_US.UTF-8"
sort(v)
[1] "<0" "1" "2" ">3"
Max OS 10.5.8, R 2.10.1
-------------------
v <- c("1","<0",">3","2")
Sys.setlocale("LC_COLLATE","en_US.UTF-8")
[1] "en_US.UTF-8"
sort(v)
[1] "<0" ">3" "1" "2"
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Brian D. Ripley, rip...@stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
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