citespace中TFIDF、LLR MI，分别表示什么意思？

snachina

生成的narrative summary中第一个图表中，TFIDF、LLR   MI，分别表示什么意思？答复：

tfidf = tf x idf = term frequency by inverted document frequency
LLR = log-likelihood ratio
MI = mutual information
详见：
Chen, C., Ibekwe-SanJuan, F., & Hou, J. (2010) The structure and dynamics of co-citation clusters: A multiple-perspective co-citation analysis. Journal of the American Society for Information Science and Technology, 61(7), 1386-1409. 10.1002/asi.21309