Tiny note: an easier way to get the dimension you want to average over to the 0 position than reorder is mv. That also can take negative numbers which count backwards from end, leading to this very common idiom: 
print $matrix->mv(-1,0)->avgover;

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

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