I have a list of indices from an array that was numerically sorted. I would like to sort the second dimension of a 3 dimensional array: 
#construct 2D array
for (my $e = 0; $e < @dim1; $e++) {
    $arr_1[$e] = [ @array ];
}

# fill array
for (my $i = 0; $i < 10; $i++) {
    @tmp_array = undef;
    for (my $e = 0; $e < @suff; $e++) {
    $tmp_array[$e] = $e;
    }
    push @{ $arr_1[$i] }, [ @tmp_array ];
}

# Get the indices from the sorted list
@indices = sort { $arr2sort[$a] <=> $arr2sort[$b] } 0..$#arr2sort;

# Sort the 3D array?
for (my $e = 0; $e < @suff; $e++) {
        @{ $arr_1[$i] } = @{ $arr_1[$i][@indices] };
}

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This code continues to give the error: Can't use an undefined value as an ARRAY reference at analyze.pl for the sorting routine. How can I sort the second dimension of @arr_1? Is @arr_1 a 3D array in the way that I have coded it?

In reply to Sorting multidimensional arrays using a list of indices by eas2domine

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