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#!/usr/bin/env ruby
require 'trollop'
require 'zlib'
STDIN.set_encoding 'utf-8'
STDOUT.set_encoding 'utf-8'
opts = Trollop::options do
opt :filter, "Filter if key does not appear in every file.", :type => :bool, :default => false
end
def usage
puts "avg_weights_filter [--filter] <filename>+"
exit 1
end
usage if ARGV.size==0
h = {}
ARGV.each { |fn|
if File.extname(fn)=='.gz'
f = Zlib::GzipReader.new(File.new(fn, 'rb'))
else
f = File.new fn, 'r'
end
while line = f.gets
k, v = line.split
v = v.to_f
if h.has_key? k
h[k] << v
else
h[k] = [v]
end
end
f.close
}
n = ARGV.size.to_f
h.each_pair { |k,a|
next if opts[:filter] and a.size < n
puts "#{k} #{a.inject(:+)/n}"
}
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