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Posted to dev@mahout.apache.org by "Suneel Marthi (JIRA)" <ji...@apache.org> on 2015/10/22 19:29:27 UTC
[jira] [Resolved] (MAHOUT-1567) Add online sparse dictionary
learning (dimensionality reduction)
[ https://issues.apache.org/jira/browse/MAHOUT-1567?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Suneel Marthi resolved MAHOUT-1567.
-----------------------------------
Resolution: Won't Fix
Fix Version/s: 0.12.0
Not heard from the original author, marking this is as 'Won't Fix'. Please feel free to create a new JIRA and submit patch if you would like to restart this work.
> Add online sparse dictionary learning (dimensionality reduction)
> ----------------------------------------------------------------
>
> Key: MAHOUT-1567
> URL: https://issues.apache.org/jira/browse/MAHOUT-1567
> Project: Mahout
> Issue Type: Improvement
> Components: Collaborative Filtering
> Reporter: Maciej Kula
> Assignee: Suneel Marthi
> Labels: DSL, scala
> Fix For: 0.12.0
>
>
> I have recently implemented a sparse online dictionary learning algorithm, with an emphasis on learning very high-dimensional and very sparse dictionaries. It is based on J. Mairal et al 'Online Dictionary Learning for Sparse Coding' (http://www.di.ens.fr/willow/pdfs/icml09.pdf). It's an online variant of low-rank matrix factorization, suitable for sparse binary matrices (such as implicit feedback matrices).
> I would be very happy to bring this up to the Mahout standard and contribute to the main codebase --- is this something you would in principle be interested in having?
> The code (as well as some examples) are here: https://github.com/maciejkula/dictionarylearning
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