bench/shootout/knucleotide.ruby-2.ruby

   1 # The Computer Language Shootout
   2 # http://shootout.alioth.debian.org
   3 #
   4 # contributed by jose fco. gonzalez
   5 # modified by Sokolov Yura
   6
   7 seq = String.new
   8
   9 def frecuency( seq,length )
  10     n, table = seq.length - length + 1, Hash.new(0)
  11     f, i = nil, nil
  12     (0 ... length).each do |f|
  13         (f ... n).step(length) do |i|
  14             table[seq[i,length]] += 1
  15         end
  16     end
  17     [n,table]
  18
  19 end
  20
  21 def sort_by_freq( seq,length )
  22     n,table = frecuency( seq,length )
  23     a, b, v = nil, nil, nil
  24     table.sort{|a,b| b[1] <=> a[1]}.each do |v|
  25         puts "%s %.3f" % [v[0].upcase,((v[1]*100).to_f/n)]
  26     end
  27     puts
  28 end
  29
  30 def find_seq( seq,s )
  31     n,table = frecuency( seq,s.length )
  32     puts "#{table[s].to_s}\t#{s.upcase}"
  33 end
  34
  35 line = STDIN.gets while line !~ /^>THREE/
  36 line = STDIN.gets
  37 while (line !~ /^>/) & line do
  38     seq << line.chomp
  39     line = STDIN.gets
  40 end
  41
  42 [1,2].each {|i| sort_by_freq( seq,i ) }
  43
  44 %w(ggt ggta ggtatt ggtattttaatt ggtattttaatttatagt).each{|s| find_seq( seq,s) }