Hi. Your question isn't really clear to me, but I guess you want a cartesian product. For example, with the input you gave, I think you want the output 

1 5 7
1 5 4
1 5 9
1 3 7
1 3 4

...
3 8 4
3 8 9

[download]
That's a problem I've met quite a few times but I always find it hard to implement them (especially the more complicated versions. Here is a solution: 
use warnings; use strict;
sub cartesian_product {
        @_ or return [];
        my @last = @{pop()};
        map { my @x = @$_; map { [@x, $_] } @last } cartesian_product(
+@_);
}
my @columns = ([1, 2, 5, 7, 3], [5, 3, 1, 8], [7, 4, 9]);
my @r = cartesian_product(@columns);
for (@r) {
        print join(" ", @$_), "\n";
}
__END__

[download]

In reply to Re: dynamic matrix by ambrus
in thread dynamic matrix by liri

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