Also, another way to avoid the "uninitialized variable" warning is to use the += operator. 
instead of this: $m_avrg[$a][$b] = ($m_avrg[$a][$b] + $list[$a][$b]);
use this:        $m_avrg[$a][$b] += $list[$a][$b];

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In reply to Re^2: how to get average of matrices' elements? by Anonymous Monk
in thread how to get average of matrices' elements? by fasoli

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