Yes http://lists.gnu.org/archive/html/bug-coreutils/2006-06/msg00211.html in particular is pretty much exactly the same feature request.
What is the current thinking on this? Raphael On 4 April 2010 05:22, Steve Ward <plane...@gmail.com> wrote: > This might be relevant: > > uniq: missing option -W / --check-fields=N > http://lists.gnu.org/archive/html/bug-coreutils/2006-06/msg00168.html > > > > Steve > > > On Sat, Apr 3, 2010 at 14:39, Raphael Clifford <drr...@gmail.com> wrote: >> >> Please excuse the cross-post but I have been told this is the >> appropriate place to place a feature request. >> >> Is it possible to make a feature request for uniq to add the "-k" >> option to specify >> fields? Interestingly uniq already has such things as >> >> -f, --skip-fields=N >> avoid comparing the first N fields >> and >> >> -s, --skip-chars=N >> avoid comparing the first N characters >> >> but no explicit option to specify which fields should be considered >> when doing the comparison. This would be very useful, for example, >> when removing duplicates from time series data (where you are only >> worried about consecutive duplicates on certain fields). The awk >> equivalent would be something like >> >> awk '$2$3$4$5 != p; {p=$2$3$4$5}' >> >> for using fields 2 to 5 as comparators. >> >> Raphael >> >> P.S. http://www.opengroup.org/onlinepubs/9699919799/utilities/uniq.html >> is the posix specification for uniq if that is of any interest. >> Curiously it says nothing about which duplicate line to keep when you >> don't consider all fields in the comparison. >> >> >> >> >> > >
