Regarding pre_handel

[OliviaZhi]

Hi,

1. I'm wondering, shoud $$self.predict_ = pre_handel(user_ratings_train, self.predict_, self.item_count)$$ be after the auc_score?

2. You define the scores function right? But I don't see it in your code.

Thanks in advance.

[EdisonLeeeee]

Hi,

1. I'm wondering, shoud
   $$self.predict_ = pre_handel(user_ratings_train, self.predict_, self.item_count)$$
   be after the auc_score?

2. You define the scores function right? But I don't see it in your code.

Thanks in advance.

@OliviaZhi , Hi, maybe I could answer your question:

Q1: self.predict_ = pre_handel(user_ratings_train, self.predict_, self.item_count) shouldn't be after the auc_score, because the method pre_handel convert the scores of users rated in training set to zero, so they will not affect the auc_score (cause they always higher than others)

Q2: I didn't see scores function, too. Maybe @RunlongYu doesn't upload it. I can guess it must implemented like this: calculate the top-k (k=5 in his code) rated items for each user, and compare to the test set, which could be used to calculate precision@k, recall@k, NDCG@k and so on.