Another (tested) solution 
use strict;
use warnings;

my @results = (
        [1, 1 , 1],
        [2, 1 , 2],
        [3, 1 , 3],
        [4, 1 , 4],
        [1, 2 , 5],
        [2, 2 , 6],
        [3, 2 , 7],
        [4, 2 , 8],
        [2, 3 , 9],
        [4, 3 , 10],
        [1, 4 , 11],
        [2, 4 , 12],
        [4, 4 , 13],
        [3, 5 , 14]
    );

my %table;
my %cols;

foreach my $row (@results) {
    $table{$row->[1]}->{$row->[0]} = $row->[2];
    # track the columns separate
    $cols{$row->[0]}++;
}

my @cols = sort { $a <=> $b } keys %cols;

# print table headings
print "      |";
foreach (@cols) { printf(" p_%-2d |",$_) }
print "\n" . ("-" x (7 * (@cols + 1))) . "\n";

# now print rows
foreach my $row (sort { $a <=> $b } keys %table) {
    printf(" v_%-2d |", $row);
    foreach my $col (@cols) {
        if (defined $table{$row}->{$col}) {
            printf(" s_%-2d |", $table{$row}->{$col});
        }
        else { print "      |" }
    }
    print "\n";
}

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In reply to Re: Create a table from a matrix by ruzam
in thread Create a table from a matrix by Anonymous Monk

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