I took a different approach, probably less elegant and certainly
less flexible than others. But it does seems to work. As the choice
of some variable names might indicate ( %HoA $aref ), I am
relatively new to perlish ways and am just getting familiar with
usage of the various data structures.
use strict;
use warnings;
my %HoA;
while ( <DATA> ) {
next if m/^\D/; # ignore lines not beginning with a digit
my ( $SampleID, $Time, $A_ObsConc, $C_ObsConc, $F_ObsConc )
= unpack("A9 A8 A15 A9 A*", $_);
push @{ $HoA{A} } , [ $SampleID, $Time, $A_ObsConc ];
push @{ $HoA{C} } , [ $SampleID, $Time, $C_ObsConc ];
push @{ $HoA{F} } , [ $SampleID, $Time, $F_ObsConc ];
}
for my $key ( sort keys %HoA ) {
for my $aref ( @{ $HoA{$key} } ) {
printf("%s %6s %9s %9s\n", $key, @$aref );
}
}
__DATA__
A C F
SampleID Time ObsConc ObsConc ObsConc
5 24 2.27E+06 687.02 32521.94
5 168 1.92E+06 525.02 22198.44
5 12 2.94E+06 896.39 41331.61
5 -0.5 2.23E+06 942.34 40616.49
5 8 4.03E+06 1371.32 45863.69
6 24 1.02E+06 1057.89 46341.04
6 168 3.14E+06 4987.32 42166.08
