def _print_ll(self):
        """
        m._print_ll() -- Print log-likelihood (scoring) matrix
        """
        print "#  ",
        for i in range(self.width):
            print "  %4d   "%i,
        print
        for L in ['A', 'C', 'T', 'G']:
            print "#%s "%L,
            for i in range(self.width):
                print  "%8.3f "%self.ll[i][L],
            print
m._print_ll() -- Print log-likelihood (scoring) matrix