wild guess - is this the kind of thing you are looking for ? 

#!/usr/bin/perl

# http://perlmonks.org/?node_id=1134550

use warnings;
use strict;

my (@left, %left, @top, %top, %values);
my $all = '';

while(<DATA>)
   {
   $all |= $_ for my ($left, $top, $value) = split;
   $left{$left}++ or push @left, $left;
   $top{$top}++ or push @top, $top;
   $values{$left}{$top} = $value;
   }

my $len = length $all;
my $fmt = join(' ', map "%${len}s", 0..@top) . "\n";

printf $fmt, '', @top;
for my $left (@left)
   {
   printf $fmt, $left, map $values{$left}{$_} // '', @top;
   }

__DATA__
aaa bbb 123
aaa ccc 234
aaa ddd 345
bbb ccc 456
bbb ddd 567
ccc ddd 678

[download]

prints 

    bbb ccc ddd
aaa 123 234 345
bbb     456 567
ccc         678

[download]

In reply to Re: table from repeated strings text by Anonymous Monk
in thread table from repeated strings text by anhanijr

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.