星云外

2010年4月2日

tf-idf

摘要： tf-idfThe tf-idf weight (term frequency-inverse document frequency) is a weight often used in information retrieval and text mining. This weight is a statistical measure used to evaluate how important... 阅读全文

posted @ 2010-04-02 13:53 星云外 阅读(832) 评论(0) 推荐(0) 编辑