G'day madM,

There's a whole series of problems with your post:

• We don't need to see hundreds of data items (you've posted over 500 here); just post sufficient to support whatever issue you're describing.
• You don't show your input data structure (presumably a hashref with the meaningless name $A).
• You don't show the output you want.
• You don't tell us what part of the code you're having difficulties with.
• You show an @aminos array but don't use it in your code.
• Your printf format suggests floating point data but all data shown are integers.
• You've used the repetition operator (x) in two places that suggests you don't fully understand what this is for. It's explained in "perlop: Multiplicative Operators".

Overall, it's very difficult to ascertain what exactly you need help with. Please read the guidelines in "How do I post a question effectively?" to find out how to compose a question that will help us to help you.

As indicated by the printf documentation, you should look at sprintf for information on formats.

Here's a best guess at what you're trying to achieve. If my guess is wrong (which is quite likely), it should at least provide some pointers for improving your code.

#!/usr/bin/env perl

use strict;
use warnings;

my %data = (
    A => { A => 5,  R => -2, N => -1 },
    R => { A => -2, R => 7,  N => -1 },
    N => { A => -1, R => -1, N => 7 },
);

my @keys = sort keys %data;

print ' ';
printf "%4s" => $_ for @keys;
print "\n";

for my $row (@keys) {
    print $row;
    printf "%4s" => $data{$row}{$_} for @keys;
    print "\n";
}
[download]

Output:

    A   N   R
A   5  -1  -2
N  -1   7  -1
R  -2  -1   7
[download]