# File lib/cassiopee.rb, line 34
    def computeHammingAmbiguous(pattern,hamming,ambiguous)
        nberr = 0
        (0..(self.length-1)).each do |c|
                if(!isAmbiguousEqual(pattern[c],self[c],ambiguous))
                        nberr = nberr+1
                        if(nberr>hamming.to_i)
                                return -1               
                        end
                end
        end
        return nberr
    end