Sorting depends on the locale. For example, I get
> x <- c(LETTERS[1:3], paste(" ", LETTERS[1:3], sep=""))
> x
[1] "A" "B" "C" " A" " B" " C"
> sort(x)
[1] " A" " B" " C" "A" "B" "C"
>On Linux (Fedora Core 1) I set LANG=C, which is necessary for some other (non-R) things to work.
-roger
[EMAIL PROTECTED] wrote:
The following is not what I expected in sorting characters (single letters and the same letters with preceding spaces).
Can someone enlighten me as to why the following might be a correct result for sorting?
; x <- c(LETTERS[1:3], paste(" ", LETTERS[1:3], sep="")) ; x [1] "A" "B" "C" " A" " B" " C" ; sort(x) [1] "A" " A" "B" " B" "C" " C" ; sort(x, method="shell") [1] "A" " A" "B" " B" "C" " C" ; sort(x, method="quick") [1] "A" " A" "B" " B" "C" " C"
I would expect the result to be " A" " B" " C" "A" "B" "C" instead, going by ASCII codes (and a quick check with S-Plus 6.2 shows that this is what S-Plus thinks the sorted sequence is).
Thanks,
Andreas Krause
PS. Version specs:
; version
_ platform i686-pc-linux-gnu
arch i686 os linux-gnu system i686, linux-gnu status major 1 minor 9.1 year 2004 month 06 day 21 language R
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