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#!/usr/bin/env ruby
require 'zipf'
require 'optimist'
def main
conf = Optimist::options do
opt :inputs, "inputs, comma separated", :type => :string, :short => "-i", :required => true
opt :output_suffix, "output suffix", :type => :string, :default => ".out", :short => "-S"
opt :output_index, "output index", :type => :bool, :default => false, :short => "-J"
opt :min_len, "minimum length", :type => :int, :default => 1, :short => "-m"
opt :max_len, "maximum length", :type => :int, :default => 1000, :short => "-M"
opt :ignore_below, "minimum length to apply ratio test", :type => :int, :default => 7, :short => "-I"
opt :ratio_mean, "length ratio average", :type => :float, :required => true, :short => "-A"
opt :ratio_stddev, "length ratio standard deviation", :type => :float, :required => true, :short => "-T"
opt :stddev_mult, "+/- n stddevs", :type => :float, :default => 2.0, :short => "-N"
opt :reverse, "length ratios alway > 1", :type => :bool, :default => false, :short => "-r"
end
fna,fnb = conf[:inputs].split ','
a = ReadFile.new fna
b = ReadFile.new fnb
if not conf[:output_index]
a_out = WriteFile.new fna+conf[:output_suffix]
b_out = WriteFile.new fnb+conf[:output_suffix]
end
ratio_lower = conf[:ratio_mean] - (conf[:stddev_mult] * conf[:ratio_stddev])
ratio_upper = conf[:ratio_mean] + (conf[:stddev_mult] * conf[:ratio_stddev])
i = 0
while linea = a.gets
lineb = b.gets
sza = linea.strip.split.size
szb = lineb.strip.split.size
ratio = sza.to_f/szb.to_f
if conf[:reverse] and ratio < 1
ratio = ratio**(-1)
end
if (sza > 0 and sza <= conf[:ignore_below] and szb > 0 and szb <= conf[:ignore_below]) or
(sza >= conf[:min_len] and szb >= conf[:min_len] and
sza <= conf[:max_len] and szb <= conf[:max_len] and
ratio >= ratio_lower and
ratio <= ratio_upper)
if not conf[:output_index]
a_out.write linea
b_out.write lineb
else
puts i
end
end
i += 1
end
a.close
b.close
if not conf[:output_index]
a_out.close
b_out.close
end
end
main
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