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Posted to dev@mahout.apache.org by "Sebastian Schelter (JIRA)" <ji...@apache.org> on 2010/08/31 09:05:53 UTC
[jira] Created: (MAHOUT-493) Explicit filter for user/item pairs in
o.a.m.cf.taste.hadoop.item.RecommenderJob
Explicit filter for user/item pairs in o.a.m.cf.taste.hadoop.item.RecommenderJob
--------------------------------------------------------------------------------
Key: MAHOUT-493
URL: https://issues.apache.org/jira/browse/MAHOUT-493
Project: Mahout
Issue Type: New Feature
Components: Collaborative Filtering
Affects Versions: 0.5
Reporter: Sebastian Schelter
It should be possible to explicitly prevent to have certain items recommended to certain users although they do not have a preference towards them.
This filter is necessary because a user might have stated to never be shown a recommended item again.
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[jira] Commented: (MAHOUT-493) Explicit filter for user/item pairs
in o.a.m.cf.taste.hadoop.item.RecommenderJob
Posted by "Sebastian Schelter (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAHOUT-493?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12906817#action_12906817 ]
Sebastian Schelter commented on MAHOUT-493:
-------------------------------------------
I did not like the idea to load a file containing all user/item pairs to filter into memory in the final Reducer which was proposed on the mailing list, as this might introduce scaling issues.
I think I found a better way to include the filtering logic in the distributed recommendation process. For a user that should not be recommended an item we join an artificial NaN summand into the estimation of his/her preference towards that item so that this item will automatically be excluded.
Patch is coming soon.
> Explicit filter for user/item pairs in o.a.m.cf.taste.hadoop.item.RecommenderJob
> --------------------------------------------------------------------------------
>
> Key: MAHOUT-493
> URL: https://issues.apache.org/jira/browse/MAHOUT-493
> Project: Mahout
> Issue Type: New Feature
> Components: Collaborative Filtering
> Affects Versions: 0.5
> Reporter: Sebastian Schelter
>
> It should be possible to explicitly prevent having a given item being recommended to a given user.
> This filter is necessary because that user might have stated to never be shown a recommended item again.
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You can reply to this email to add a comment to the issue online.
[jira] Updated: (MAHOUT-493) Explicit filter for user/item pairs in
o.a.m.cf.taste.hadoop.item.RecommenderJob
Posted by "Sebastian Schelter (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAHOUT-493?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sebastian Schelter updated MAHOUT-493:
--------------------------------------
Status: Resolved (was: Patch Available)
Resolution: Fixed
> Explicit filter for user/item pairs in o.a.m.cf.taste.hadoop.item.RecommenderJob
> --------------------------------------------------------------------------------
>
> Key: MAHOUT-493
> URL: https://issues.apache.org/jira/browse/MAHOUT-493
> Project: Mahout
> Issue Type: New Feature
> Components: Collaborative Filtering
> Affects Versions: 0.4
> Reporter: Sebastian Schelter
> Fix For: 0.4
>
> Attachments: MAHOUT-493.patch
>
>
> It should be possible to explicitly prevent having a given item being recommended to a given user.
> This filter is necessary because that user might have stated to never be shown a recommended item again.
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[jira] Commented: (MAHOUT-493) Explicit filter for user/item pairs
in o.a.m.cf.taste.hadoop.item.RecommenderJob
Posted by "Hudson (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAHOUT-493?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12907452#action_12907452 ]
Hudson commented on MAHOUT-493:
-------------------------------
Integrated in Mahout-Quality #263 (See [https://hudson.apache.org/hudson/job/Mahout-Quality/263/])
> Explicit filter for user/item pairs in o.a.m.cf.taste.hadoop.item.RecommenderJob
> --------------------------------------------------------------------------------
>
> Key: MAHOUT-493
> URL: https://issues.apache.org/jira/browse/MAHOUT-493
> Project: Mahout
> Issue Type: New Feature
> Components: Collaborative Filtering
> Affects Versions: 0.4
> Reporter: Sebastian Schelter
> Fix For: 0.4
>
> Attachments: MAHOUT-493.patch
>
>
> It should be possible to explicitly prevent having a given item being recommended to a given user.
> This filter is necessary because that user might have stated to never be shown a recommended item again.
--
This message is automatically generated by JIRA.
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You can reply to this email to add a comment to the issue online.
[jira] Updated: (MAHOUT-493) Explicit filter for user/item pairs in
o.a.m.cf.taste.hadoop.item.RecommenderJob
Posted by "Sebastian Schelter (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAHOUT-493?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sebastian Schelter updated MAHOUT-493:
--------------------------------------
Attachment: MAHOUT-493.patch
> Explicit filter for user/item pairs in o.a.m.cf.taste.hadoop.item.RecommenderJob
> --------------------------------------------------------------------------------
>
> Key: MAHOUT-493
> URL: https://issues.apache.org/jira/browse/MAHOUT-493
> Project: Mahout
> Issue Type: New Feature
> Components: Collaborative Filtering
> Affects Versions: 0.5
> Reporter: Sebastian Schelter
> Attachments: MAHOUT-493.patch
>
>
> It should be possible to explicitly prevent having a given item being recommended to a given user.
> This filter is necessary because that user might have stated to never be shown a recommended item again.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
[jira] Updated: (MAHOUT-493) Explicit filter for user/item pairs in
o.a.m.cf.taste.hadoop.item.RecommenderJob
Posted by "Sebastian Schelter (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAHOUT-493?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sebastian Schelter updated MAHOUT-493:
--------------------------------------
Description:
It should be possible to explicitly prevent having a given item being recommended to a given user.
This filter is necessary because that user might have stated to never be shown a recommended item again.
was:
It should be possible to explicitly prevent to have certain items recommended to certain users although they do not have a preference towards them.
This filter is necessary because a user might have stated to never be shown a recommended item again.
> Explicit filter for user/item pairs in o.a.m.cf.taste.hadoop.item.RecommenderJob
> --------------------------------------------------------------------------------
>
> Key: MAHOUT-493
> URL: https://issues.apache.org/jira/browse/MAHOUT-493
> Project: Mahout
> Issue Type: New Feature
> Components: Collaborative Filtering
> Affects Versions: 0.5
> Reporter: Sebastian Schelter
>
> It should be possible to explicitly prevent having a given item being recommended to a given user.
> This filter is necessary because that user might have stated to never be shown a recommended item again.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
[jira] Updated: (MAHOUT-493) Explicit filter for user/item pairs in
o.a.m.cf.taste.hadoop.item.RecommenderJob
Posted by "Sebastian Schelter (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAHOUT-493?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sebastian Schelter updated MAHOUT-493:
--------------------------------------
Status: Patch Available (was: Open)
Affects Version/s: 0.4
(was: 0.5)
Fix Version/s: 0.4
Patch provided for review. I plan to commit this tomorrow.
> Explicit filter for user/item pairs in o.a.m.cf.taste.hadoop.item.RecommenderJob
> --------------------------------------------------------------------------------
>
> Key: MAHOUT-493
> URL: https://issues.apache.org/jira/browse/MAHOUT-493
> Project: Mahout
> Issue Type: New Feature
> Components: Collaborative Filtering
> Affects Versions: 0.4
> Reporter: Sebastian Schelter
> Fix For: 0.4
>
> Attachments: MAHOUT-493.patch
>
>
> It should be possible to explicitly prevent having a given item being recommended to a given user.
> This filter is necessary because that user might have stated to never be shown a recommended item again.
--
This message is automatically generated by JIRA.
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You can reply to this email to add a comment to the issue online.