Then I think you really need exactly what I suggested in my second answer. Replace your code by the following one for each of your three hashes: 
$hash1{$_}++ for @elements;

[download]
(changing obviously to the right hash name depending on the switch variable) and I think it should do the trick.

In reply to Re^5: Hashes, keys and multiple histogram by Laurent_R
in thread Hashes, keys and multiple histogram by f77coder

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