>>>>> "Gabor" == Gabor Grothendieck <[EMAIL PROTECTED]> >>>>> on Wed, 1 Dec 2004 21:05:59 -0500 (EST) writes:
Gabor> Can someone verify whether or not this is a bug. Gabor> When I substitute all occurrence of "\\B" with "X" R Gabor> seems to correctly place an X at all non-word Gabor> boundaries (whether or not I specify perl) but "\\b" Gabor> does not seem to act on all complement positions: >> gsub("\\b", "X", "abc def") # nothing done Gabor> [1] "abc def" >> gsub("\\B", "X", "abc def") # as expected, I think Gabor> [1] "aXbXc dXeXf" >> gsub("\\b", "X", "abc def", perl = TRUE) # not as >> expected Gabor> [1] "abc Xdef" >> gsub("\\B", "X", "abc def", perl = TRUE) # as expected Gabor> [1] "aXbXc dXeXf" >> R.version.string # Windows 2000 Gabor> [1] "R version 2.0.1, 2004-11-27" I agree this looks "unfortunate". Just to confirm: 1) I get the same on a Linux version 2) the real perl does behave differently and as you (and I) would have expected: $ echo 'abc def'| perl -pe 's/\b/X/g' XabcX XdefX $ echo 'abc def'| perl -pe 's/\B/X/g' aXbXc dXeXf Also, from what I see, "\b" should behave the same independently of perl = TRUE or FALSE. -- Martin ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-devel