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From "Sebastian Schelter (JIRA)" <>
Subject [jira] [Commented] (MAHOUT-737) Implicit Alternating Least Squares SVD
Date Mon, 20 Jun 2011 09:11:47 GMT


Sebastian Schelter commented on MAHOUT-737:

Do you think it would be possible to refactor this code to implement
? That would be great because then we could easily drop it into the existing (very lean) SVDRecommender.

> Implicit Alternating Least Squares SVD
> --------------------------------------
>                 Key: MAHOUT-737
>                 URL:
>             Project: Mahout
>          Issue Type: Improvement
>            Reporter: Tamas Jambor
>         Attachments: MAHOUT-737.patch
> I am sharing this Java implementation of mine that is based on the paper - Collaborative
Filtering with Implicit Datasets. The implementation is multi-treading and can be easily extended
to use it on Hadoop. In fact this approach would possibly work with non-implicit datasets,
but further testing is needed. The algorithm is tried and tested on an implicit TV-viewing
dataset, and the performance was pretty good (details to follow). 

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