#!/usr/bin/perl

# http://perlmonks.org/?node_id=1136784

use strict;
use warnings;

my (%counts, %unique, %masks);
my ($headname, @unique) = grep !$unique{$_}++, my @headers = split ' '
+, <DATA>;
for my $label ( @unique )
  {
  $masks{$label} = join ' ',
    map { $_ eq $label ? 'M' : '_' } @headers[1..$#headers];
  }

while(<DATA>)
  {
  s/\s+/ /g; # for uniform spacing
  my ($name, $letters) = split ' ', $_, 2;
  $counts{$name}{$_} += ($masks{$_} | $letters) =~ /M/ for @unique;
  }

print "$headname @unique\n";
print "$_ @{ $counts{$_} }{@unique}\n" for sort keys %counts;

# Gname G1 G2 G3
# A 1 0 1
# B 1 2 2
# C 2 1 0

__DATA__
Gname   G1      G1      G1      G1      G2      G2      G3
A       W       W       M       W       W       W       M
A       W       W       W       W       W       W       W
A       W       W       W       W       W       W       W
B       W       W       W       W       W       M       M
B       M       W       W       W       W       M       M
C       M       M       M       W       W       W       W
C       M       W       W       M       M       W       W

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In reply to Re: how to sum over rows based on column headings in perl by Anonymous Monk
in thread how to sum over rows based on column headings in perl by angerusso

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