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
>
-roger
--
Roger D. Peng | http://www.biostat.jhsph.edu/~rpeng/
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