Well, who am I to break this long-standing ritual? :)
Interestingly, while the printed output looks wrong, I get
> v <- paste(0:10, "asdf", sep = ".")
> a <- sub(".asdf", "", v, fixed = TRUE)
> b <- as.character(0:10)
> identical(a, b)
[1] TRUE
>
-roger
Peter Dalgaard wrote:
> "Roger D. Peng" <[EMAIL PROTECTED]> writes:
>
>
>>I've noticed what I think is curious behavior in using 'sub(fixed = TRUE)'
>>and
>>was wondering if my expectation is incorrect. Here is one example:
>>
>>v <- paste(0:10, "asdf", sep = ".")
>>sub(".asdf", "", v, fixed = TRUE)
>>
>>The results I get are
>>
>> > sub(".asdf", "", v, fixed = TRUE)
>> [1] "0" "1\0st\0\0" "2\0<af>\001\0\0" "3\0<af>\001\0\0"
>> [5] "4\0mes\0" "5\0<ba>\001\0\0" "6\0\0\0\0\0" "7\0\0\0m\0"
>> [9] "8\0\0\0t\0" "9\0<fe>\0\0\0" "10\0\0\0\0\0"
>> >
>>
>>I expected "0" in the first entry and everything else would be unchanged.
>>Your
>>results may vary since every time I run 'sub()' in this way, I get a slightly
>>different answer in entires 2 through 11.
>>
>>As it turns out, 'gsub(fixed = TRUE)' gives me the answer I *actually*
>>wanted,
>>which was to replace the string in every entry. But I still think the
>>behavior
>>of 'sub(fixed = TRUE) is a bit odd.
>>
>> > version
>> _
>>platform x86_64-unknown-linux-gnu
>>arch x86_64
>>os linux-gnu
>>system x86_64, linux-gnu
>>status
>>major 2
>>minor 2.1
>>year 2005
>>month 12
>>day 20
>>svn rev 36812
>>language R
>> >
>
>
> Argh...
>
> year 2005
> month 12
> day 21
>
> and something like this gets discovered. It's a ritual, I tell ya, a ritual!
>
> If you look at the output and terminate all strings at the embedded
> \0, it looks much more sensible, so it should be fairly easy to spot
> the cause of this bug...
>
--
Roger D. Peng | http://www.biostat.jhsph.edu/~rpeng/
______________________________________________
R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel
