zenogantner/MyMediaLite — pull request #386 by joaoms (2013-01-10 13:43:33+00:00)
Title: Incremental support for ItemKNN and UserKNN item recommenders (revisited)

Hi there,

I guess this is better now.

Original message:
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Hi,

I managed to add support for incremental updates to classic item recommenders (UserKNN and ItemKNN).

Class hierarchy changes:

KNN is now subclass of IncrementalItemRecommender

Limitations:

Only works with cosine and cooccurrence correlations
Slow neighbor retraining (though with some selectiveness)
Not "bullet proof" tested, maybe some bugs are still present
[SOLVED] Lots of commits for rather few changes (i'm still new to git, sorry about that)

Literature:
http://www.springerlink.com/index/861k581047371165.pdf (no free pdf here...)
https://www.forth.gr/ics/isl/publications/paperlink/LNCS_Formatted_ISMIS-05_34880553.pdf

Please send you comments.
Regards,
João Vinagre