To work with matrices, use PDL.

Update

I've got it! It's super easy. Just pile the matrices one on another, and then project the 3D matrix by average in the z dimension: 

#!/usr/bin/perl
use warnings;
use strict;

use PDL;

sub load {
    my ($filename) = @_;
    open my $FH, '<', $filename or die $!;
    return pdl(map [split], <$FH>)

}

my $matrix = cat(map load($_), @ARGV);
print average($matrix->reorder(2,0,1));

[download]

Old contents

I'm not yet familiar with it, so I had to compute the average myself by adding the matrices and dividing the result by their number, but maybe there already is a function to compute the average per element, or at least to apply a function per element. 

#!/usr/bin/perl
use warnings;
use strict;
use feature qw{ say };

use PDL;


sub load {
    my ($filename) = @_;
    open my $FH, '<', $filename or die $!;
    return pdl(join "\n", map { chomp; "[$_]" } <$FH>)
}


my @matrices = map load($_), @ARGV;
my $result = $matrices[0];
$result += $_ for @matrices[ 1 .. $#matrices ];
$result /= @ARGV;
say $result;

[download]
 
($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,

[download]

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

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