word_bool_distance.py 文件源码

def pwdist_jaccard(self, seq1idx, seq2idx):
        """Compute the Jaccard-Needham dissimilarity
        between two boolean 1-D arrays.

        Returns:
            distance value (double)

        """
        u = self[seq1idx]
        v = self[seq2idx]
        dist = (np.double(np.bitwise_and((u != v),
                np.bitwise_or(u != 0, v != 0)).sum()) /
                np.double(np.bitwise_or(u != 0, v != 0).sum()))
        return dist