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use strict; use warnings; use List::Util qw(min); my %seahash; my $date; my $time; my $coolflag; while(<DATA>){ next if /^date\/time/; chomp; my ($date, $time, $lat, $lon, $depth, $flag, $coolflag, $otherflag) = + split; # you could need the other variables later, so I save it # print $date, " ",$time, " ", $coolflag,"\n"; # checkpoint push @{$seahash{$date . " " . $time}}, $coolflag; } while (my ($timestamp, $flags) = each (%seahash)) { print $timestamp, " ", min(@{$flags}),"\n"} __DATA__ date/time lat, lon, depth, flag, flag, flag 21-sep-2012 01:00:00 0 0 -200 a 1 c 21-sep-2012 01:00:00 0 0 -100 a 9 c 20-sep-2012 02:20:00 0 0 -1500 a 2 c 20-sep-2012 02:20:00 0 0 -500 a 4 c 20-sep-2012 02:20:00 0 0 -400 a 3 c 20-sep-2012 02:20:00 0 0 -300 a 3 c 10-Aug-2012 02:20:00 0 0 -200 a 3 c 10-Aug-2012 02:20:00 0 0 -200 a 1 c 10-Aug-2012 02:20:00 0 0 -200 a 7 c

In reply to Re: Selecting a particular record from groups of records by pvaldes
in thread Selecting a particular record from groups of records by msexton

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