It's actually a little more complicated. I wrote a note, but it seems to be
stuck in the outbox on my home machine (I probably forgot to click Send...).
One important aspect is that
> "x" < "\265g"
[1] NA
which makes me wonder if the bug really is in the case that "works". It seems
that it is possible to rank() character vectors that contain incomparable
elements.
-pd
On 09 Sep 2014, at 16:19 , Martin Maechler <maech...@stat.math.ethz.ch> wrote:
>>>>>> MacQueen, Don <macque...@llnl.gov>
>>>>>> on Mon, 8 Sep 2014 16:06:21 +0000 writes:
>
>> I have found that order() fails in a rather arcane circumstance, as in
>> this example:
>
>>> foo <- I( c('x','\265g') )
>>> order(foo)
>> Error in if (xi > xj) 1L else -1L : missing value where TRUE/FALSE needed
>
>>> foo <-c('x','\265g')
>>> order(foo)
>> [1] 1 2
>
> yes, this is not desirable.
> order() in such cases calls xtfrm() {as documented}
> and that ends up calling rank() and then the internal .gt()
> where the bug happens because
>
>> I("x") > I("\xb5g")
> [1] NA
>
> but really I think the change should happen in xtfrm.Asis(.)
> which I think should drop the class also in this case.
>
> More on this, once we have fixed it.
>
> Thank you, Don, very much!
>
> Martin Maechler,
> ETH Zurich
>
>>> sessionInfo()
>> R version 3.1.1 (2014-07-10)
>> Platform: x86_64-apple-darwin13.1.0 (64-bit)
>
>> locale:
>> [1] C
>
>> attached base packages:
>> [1] stats graphics grDevices utils datasets methods base
>
>> Thanks
>> -Don
>
>> p.s.
>> Just a little background, irrelevant unless one wonders why I¹m using I()
>> and \265:
>
>> If I were writing new code I wouldn¹t be using I(), since there are better
>> ways now to achieve the same end (preventing the creation of factors in
>> data frames), but the scripts that use it are quite old, originally
>> developed in 2001.
>
>> In at least some but perhaps limited contexts, Œ\265¹ produces the greek
>> letter mu, and that¹s why I¹m using it. And if I remember correctly, 2001
>> is prior to the current R support for locales and extended character sets.
>> Using \265 is what I could find at that time to get a mu into my output.
>
>> I came across this while checking some things; it¹s not actually breaking
>> my scripts, so I doubt it¹s due to any recent change.
>
>
>> --
>> Don MacQueen
>
>> Lawrence Livermore National Laboratory
>> 7000 East Ave., L-627
>> Livermore, CA 94550
>> 925-423-1062
>
>> ______________________________________________
>> R-devel@r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-devel
>
> ______________________________________________
> R-devel@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
--
Peter Dalgaard, Professor,
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Email: pd....@cbs.dk Priv: pda...@gmail.com
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