# >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
require 'maasha/bits'
-require 'maasha/seq/backtrack'
require 'maasha/seq/digest'
-#require 'maasha/seq/patscan'
-require 'maasha/seq/patternmatcher'
require 'maasha/seq/trim'
require 'narray'
+autoload :BackTrack, 'maasha/seq/backtrack.rb'
+autoload :Dynamic, 'maasha/seq/dynamic.rb'
+
# Residue alphabets
DNA = %w[a t c g]
RNA = %w[a u c g]
class SeqError < StandardError; end
class Seq
- #include Patscan
- include PatternMatcher
- include BackTrack
include Digest
include Trim
qual = self.qual[start .. stop] unless self.qual.nil?
end
- Seq.new(self.seq_name.dup, seq, self.type, qual)
+ Seq.new(self.seq_name, seq, self.type, qual) # TODO changed self.seq_name.dup to self.seq_name -> consequence?
end
# Method that replaces a sequence with a subsequence from a given start position
# and of a given length.
def subseq!(start, length = self.length - start)
- raise SeqError, "subsequence start: #{start} < 0" if start < 0
- raise SeqError, "subsequence length: #{length} < 0" if length < 0
- raise SeqError, "subsequence start + length > Seq.length: #{start} + #{length} > #{self.length}" if start + length > self.length
+ s = subseq(start, length)
- if length == 0
- self.seq = ""
- self.qual = "" unless self.qual.nil?
- else
- stop = start + length - 1
-
- self.seq = self.seq[start .. stop]
- self.qual = self.qual[start .. stop] unless self.qual.nil?
- end
+ self.seq_name = s.seq_name
+ self.seq = s.seq
+ self.type = s.type
+ self.qual = s.qual
self
end
self
end
+ # Method that determines if a quality score string can be
+ # absolutely identified as base 33.
+ def qual_base33?
+ self.qual.match(/[!-:]/)
+ end
+
+ # Method that determines if a quality score string can be
+ # absolutely identified as base 64.
+ def qual_base64?
+ self.qual.match(/[K-h]/)
+ end
+
# Method to convert quality scores inbetween formats.
# Sanger base 33, range 0-40
+ # 454 base 64, range 0-40
# Solexa base 64, range -5-40
# Illumina13 base 64, range 0-40
# Illumina15 base 64, range 3-40
case from.downcase
when "sanger" then na_qual -= 33
+ when "454" then na_qual -= 64
when "solexa" then na_qual -= 64
when "illumina13" then na_qual -= 64
when "illumina15" then na_qual -= 64
case to.downcase
when "sanger" then na_qual += 33
+ when "454" then na_qual += 64
when "solexa" then na_qual += 64
when "illumina13" then na_qual += 64
when "illumina15" then na_qual += 64