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From PierLorenzo Bianchini <>
Subject adjusted cosine similarity for item-based recommender?
Date Fri, 03 Apr 2015 10:36:02 GMT
hello everyone,
I'm trying to build item-based recommender that would take the users' rating-bias into account.
According to my class' slides, that should involve "adjusted cosine similarity". I couldn't
find such implementation in Mahout... did I search it in the wrong place or should I implement
it? If so, how? Any tips would be welcome since I'm new to Mahout...

I found out that in mahout-0.8 there was a (deprecated) class that seemed to do what I'm looking
for (
Does anybody know why this was removed?

Note: I also posted the question on stackoferlow (
Thank you in advance! Regards,

Pier Lorenzo

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