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Published 20 hours ago • verified publisher icon practical-recommender-systems

The value of similarity matrix may be wrong

Open yoheimiyamoto opened this issue 2 years ago • 1 comments

Chapter8 Collaborative filtering in the neighborhood

8.4 Amazon's algorithm to precalculate item similarity

Sim("MIB", "ST") was 0.016 with the following calculation . Screen Shot 2022-05-28 at 9 22 33

However, in the Similarity matrix explained later, a completely different value is set, Sim (MIB, ST) is 0.63.

Table 8.4 Screen Shot 2022-05-28 at 9 23 44 .

yoheimiyamoto avatar May 28 '22 00:05 yoheimiyamoto

I've noticed the same issue. Have you figured out?

pprafaellima avatar Nov 03 '23 20:11 pprafaellima