From ab0f845d69b18905915863769facc238090a273c Mon Sep 17 00:00:00 2001
From: Patrick Simianer <p@simianer.de>
Date: Thu, 14 Dec 2017 22:47:11 +0000
Subject: bitext-filter-length

---
 bitext-filter-length | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100755 bitext-filter-length

diff --git a/bitext-filter-length b/bitext-filter-length
new file mode 100755
index 0000000..d812568
--- /dev/null
+++ b/bitext-filter-length
@@ -0,0 +1,56 @@
+#!/usr/bin/env ruby
+
+require 'zipf'
+require 'trollop'
+
+def main
+  conf = Trollop::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 :min_len, "minimum length", :type => :int, :default => 1, :short => "-m"
+    opt :max_len, "maximum length", :type => :int, :default => 1000, :short => "-M"
+    #opt :ratio, "length ratio", :type => :float, :default => 0.0001, :short => "-r"
+    #opt :ratio_min_len, "minimum length to apply ratio test", :type => :int, :default => 7, :short => "-R"
+    opt :ratio_avg, "length ratio average", :type => :float, :required => true, :short => "-A"
+    opt :ratio_std, "length ratio standard deviation", :type => :float, :required => true, :short => "-T"
+  end
+
+  fna,fnb = conf[:inputs].split ','
+  a = ReadFile.new fna 
+  b = ReadFile.new fnb
+  a_out = WriteFile.new fna+conf[:output_suffix]
+  b_out = WriteFile.new fnb+conf[:output_suffix]
+
+  ratio_lower = conf[:ratio_avg] - conf[:ratio_std]
+  ratio_upper = conf[:ratio_avg] + conf[:ratio_std]
+
+  while linea = a.gets
+    lineb = b.gets
+    sza = linea.strip.split.size
+    szb = lineb.strip.split.size
+    #_ = [sza,szb].map{|i|i.to_f}.sort
+    ratio = sza.to_f/szb.to_f
+    if 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 _[0] >= conf[:ratio_min_len]
+      #  ratio_ok = (_[0] / _[1]) >= conf[:ratio]
+      #else
+      #  ratio_ok = true
+      #end
+      #if ratio_ok
+      a_out.write linea
+      b_out.write lineb
+      #end
+    end
+  end
+
+  a.close
+  b.close
+  a_out.close
+  b_out.close
+end
+
+main
+
-- 
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