Method: Bio::Locations#relative

Defined in:

lib/bio/location.rb

#relative(n, type = nil) ⇒ Object

Converts absolute position in the whole of the DNA sequence to relative position in the locus.

This method can for example be used to relate positions in a DNA-sequence with those in RNA. In this use, the optional ‘:aa’-flag returns the position of the associated amino-acid rather than the nucleotide.

loc = Bio::Locations.new('complement(12838..13533)')
puts loc.relative(13524)        # => 10
puts loc.relative(13506, :aa)   # => 3

---

Arguments:

• (required) position: nucleotide position within whole of the sequence

• :aa: flag that lets method return position in aminoacid coordinates

Returns

position within the location

# File 'lib/bio/location.rb', line 385

def relative(n, type = nil)
  case type
  when :location
    ;
  when :aa
    if n = abs2rel(n)
      (n - 1) / 3 + 1
    else
      nil
    end
  else
    abs2rel(n)
  end
end