如何通过TF / IDF分数获取文档中的单词列表

Question

I have an ElasticSearch index. Given a document ID in the index, I want to get a list of words in the doc by TF-IDF scores. Is that possible to write an ES query to get the list?

Thanks in advance.

Answer 1

You could retrieve the list of all terms in the document and then use explain while searching for all words in the document.

Ex: If the document contains foo and bar, query would be:

/MY_INDEX/MY_TYPE/_search?q=_id:MY_ID foo bar&explain=true&size=1

In the score explanation you will see the idf score and the tf score for each word.