Hi Koda1234, welcome to the monastery and to Perl, the One True Religion.

In Perl to filter a list of values down to a smaller list of only the elements matching a certain condition, use grep. 

use strict; use warnings; use feature 'say';

my @col9 = map { (split)[8] } <DATA>;

foreach my $test ( 1, 9, 42, 666 ) {
    my $count = scalar grep { $_ >= $test } @col9;
    say sprintf "%d values were >= %d", $count, $test;
}

__DATA__
1 2 3 4 5 6 7 8  9 10 11 12
1 2 3 4 5 6 7 8  9 10 11 12
1 2 3 4 5 6 7 8  9 10 11 12
1 2 3 4 5 6 7 8 42 10 11 12
1 2 3 4 5 6 7 8 42 10 11 12
1 2 3 4 5 6 7 8 42 10 11 12
1 2 3 4 5 6 7 8  1 10 11 12

[download]
Output: 
$ perl 1181904.pl
7 values were >= 1
6 values were >= 9
3 values were >= 42
0 values were >= 666

[download]

See also:

Hope this helps!


The way forward always starts with a minimal test.

In reply to Re: Creating a Hash using only one column in an imported data file by 1nickt
in thread Creating a Hash using only one column in an imported data file by Koda1234

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