两字符串:
BEIJING HUADONG XING WOOLENS CO LTD
BEIJING NUO WEI ER XIN XI XI TONG CO LTD
以单词来分,
BEIJING 2
HUANDONG 1
XING 1
WOOLENS 1
CO 2
LTD 2
NUO 1
WEI 1
ER 1
XIN 1
XI 2
TONG 1
词数一共16
那么TF1=? IDF=?
TF2=? IDF=?
...全文
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tf/idf到底是怎么计算的啊?
两字符串: BEIJING HUADONG XING WOOLENS CO LTD BEIJING NUO WEI ER XIN XI XI TONG CO LTD 以单词来分, BEIJING 2 HUANDONG 1 XING 1 WOOLENS 1 CO 2 LTD 2 NUO 1 WEI 1 ER 1 XIN 1 XI 2 TONG 1 词数一共16 那么TF1=? IDF=? TF2=? IDF=?