Hi, I need convert 'associated lists' into a matrices that is accumulative of integers. Please help! I have searched high and dry and could not find a solution. Its making my hair fall out this week.. 

id1    id2    int
208    10000    1
208    10000    7
207    10000    3
8517   1147    1
3551   1147    2

   id1\id2      1147     10000
       207         0         3
       208         0         8
      3551         1         0
      8517         1         2

[download]
RESOLVED RESOLVED RESOLVED 






20x20-NMS parsers # cat list2
d1    id2       int
HAT    KNIFE    1
HAT    KNIFE    7
BALL   KNIFE    3
CAT    CLOTH    1
DOG    CLOTH    2


20x20-NMS parsers # cat test2.list | perl test2.pl
$matrix{CAT}{CLOTH} = 1
$matrix{DOG}{CLOTH} = 2
$matrix{HAT}{KNIFE} = 8
$matrix{BALL}{KNIFE} = 3
Delete Ball
$matrix{CAT}{CLOTH} = 1
$matrix{DOG}{CLOTH} = 2
$matrix{HAT}{KNIFE} = 8
Match the letter "O"

DOG

yep, HAT is there!
Print Matrix
       CLOTH  KNIFE
CAT        1      0
DOG        2      0
HAT        0      8
Done!



my %matrix;
while (<>) {
    my ($id1, $id2, $int) = split;
    $matrix{$id1}{$id2} += $int;
}

foreach $key1 (keys %matrix) {
        foreach $key2 (keys %{%matrix->{$key1}}) {
                print "\$matrix{$key1}{$key2} = $matrix{$key1}{$key2} 
+";
                }
        print"\n";
        }

# delete key
print "Delete Ball\n"; delete ($matrix{"BALL"});


foreach $key1 (keys %matrix) {
        foreach $key2 (keys %{%matrix->{$key1}}) {
           print "\$matrix{$key1}{$key2} = $matrix{$key1}{$key2} ";
           }
        print"\n";
        }

# Match
print "Match the letter \"O\"\n";
foreach $key1 (keys %matrix) {
        foreach $key2 (keys %{%matrix->{$key1}}) {
                @match = grep (/O/i, $key1);
                print "@match";
                }
        print"\n";
        }

# check for key existence
 if (exists($matrix{"HAT"}))
        {
        print "yep, HAT is there!\n";
        }

# Print Matrix
print "Print Matrix\n";
my @down = keys %matrix;
my @across = do {my %s; grep {!$s{$_}++} map {keys %$_} values %matrix
+};

my $l = 0;
$l < length ($_) and $l = length $_ for @down, @across;

print " " x $l;
printf "  %-${l}s", $_ for @across;
print "\n";
foreach my $d (@down) {
    printf "%-${l}s", $d;
    printf "  %${l}d", $matrix{$d}{$_} || 0 for @across;
    print "\n";
}

print"Done!\n";

[download]

In reply to RESOLVED - Associated lists to matrices - and accumalted integers by jaybode

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