#!/usr/bin/perl
use warnings;
use strict;

use PDL;

my $p = pdl(
    [0, 1, 2],
    [3, 4, 5],
    [6, 7, 8],
    [0, 1, 2],
    [0, 1, 2],
    [6, 7, 8],
    [0, 1, 10]);

my $u = $p->uniqvec;

my @r;
for my $i (0 .. $u->dim(1) - 1) {
    my $vec = $u->slice(':', $i);
    my $matches = $p == $vec;
    push @r, [ $matches->andover->sum ];
}

print $u->glue(0, pdl(@r));