C3_W2_RecSysNN_Assignment (user and item vectors shape)

Course Q&A Machine Learning Specialization Unsupervised Learning, Recommenders, Reinforcement
1

Hi , please i have a question about the user Vector (user_train) and the (item_train) Vector ,
it said at the first that the we have nu=397 and nm=847 so basically their shape should be
(397,17) and (847,17) , but when i checked their shape they have both (50884, 17) !

2

Hello @Radouane_BEY_OMAR,

Please check this thread out.

We have 50884 instead of 25521 ratings because , as the lab description says,

Some ratings are repeated to boost the number of training examples of underrepresented genre’s.

3 Likes
3

Yes you’re right i didn’t pay attention to it
thank You for your Help

4

You are very welcome @Radouane_BEY_OMAR :wink:

Let us know if you have other questions.

Cheers,
Raymond