$t = [ @matrix ]

##</code><code>##

my @matrix=([qw(1 2 4 4)],[qw(5 2 0 8)],[qw(9 10 11 12)],);
my $t = [ @matrix ]; 

##</code><code>##

my $t = [ [qw(1 2 4 4)],[qw(5 2 0 8)],[qw(9 10 11 12)], ];