# 内容推荐，协同过滤

Originally published at Когда нас в бой пошлёт товарищ Путин и маршал Шойгу в бой нас поведёт!. You can comment here or there.

https://www.cnblogs.com/NeilZhang/p/9900537.html

https://blog.csdn.net/nicajonh/article/details/79657317

https://blog.csdn.net/hlang8160/article/details/81433356

https://www.cnblogs.com/guoyaohua/p/9240336.html

$tf(t,d) = \frac{n_t}{\sum_k n_k}$.

$n_t$是词t的出现次数，分母的和显然是文档里的词数。

tf idf可以用于做分类。

Tags:

### Recent Posts from This Journal

• #### How weak convergence and weak topology arises naturally from infinite dimensional vector spaces

Originally published at 狗和留美者不得入内. You can comment here or there. Let be a vector space over endowed with an inner product . Assume that…

• #### Using the Minkowski functional to prove separation of sets via a hyperplane

Originally published at 狗和留美者不得入内. You can comment here or there. We shall use n.v.s to refer to normed vector space. Definition 1 Let be a…

• #### On the Baire category theorem and the open mapping theorem

Originally published at 狗和留美者不得入内. You can comment here or there. Theorem 1 (Baire Category Theorem) Let be a complete metric space. The…

• Post a new comment

#### Error

Anonymous comments are disabled in this journal

default userpic