胖胖 · 2023年11月02日

为什么说IDF越小越好

1. CFA II
2. Quantitative

 29:59 (1X) 

如果DF大，这个词就没有意思. IDF would be small.

if DF is small, the word will appear less frequently so it adds more value. IDF would be big. why does the video say we want a smaller IDF