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#!/usr/bin/env ruby
require 'zipf'
require 'trollop'
require 'zlib'
cfg = Trollop::options do
opt :weights_files, "a number of weights files: name value", :required => true
opt :filter, "Filter if key does not appear in every file.", :type => :bool, :default => false
end
h = {}
ARGV.each { |fn|
f = ReadFile.new fn
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,w|
next if cfg[:filter] and w.size < n
puts "#{k} #{w.inject(:+)/n}"
}
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