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[expand - 1 more] - ClassNotFoundException while using RecommenderJob - Mahout - [mail # user]
...Can you elaborate on how to set these classpaths?  The job takes a classpath param, (from mahout  --help)        -libjars           &nb...
   Author: Pat Ferrel , 2012-03-15, 13:51
[expand - 1 more] - Export to MongoDB - Mahout - [mail # user]
...I need to digest some mahout files and merge them into a MongoDB  database. Since digesting would be a lot easier if the mahout keys were  indexed I wonder if a "seqdumper --format...
   Author: Pat Ferrel , 2012-03-17, 22:56
Controlling output locations - Mahout - [mail # user]
...Am I loosing my mind or did the --outputPath option get removed from the MatrixMultiplicationJob recently? It looks like it is now in 'productWith-xxx' so I'll have to search for the most re...
   Author: Pat Ferrel , 2013-06-04, 15:52
[expand - 3 more] - Blending initial recommendations for cross recommendation - Mahout - [mail # user]
...Err, I think there is a mistake below.  You want to do [B'A]H_v, where H_v = A', the user's history of views as column vectors. At least that is what my code was doing.  On another...
   Author: Pat Ferrel , 2013-06-04, 17:21
Parameter choice and tuning parallelALS - Mahout - [mail # user]
...What is the intuition regarding the choice or tuning of the ALS params?  Job-Specific Options:                          ...
   Author: Pat Ferrel , 2013-01-02, 16:27
[expand - 2 more] - Negative Preferences in a Recommender - Mahout - [mail # user]
...In the case where you know a user did not like an item, how should the information be treated in a recommender? Normally for retail recommendations you have an implicit 1 for a purchase and ...
   Author: Pat Ferrel , 2013-06-18, 00:51
[expand - 1 more] - is Hadoop based SVD_ALS a complete feature? - Mahout - [mail # user]
...+1 this, found the same problems, same fixes. Haven't seem your last problem  On Jan 11, 2013, at 1:41 PM, Ying Liao  wrote:  I am tring factorize-movielens-1M.sh. I first fin...
   Author: Pat Ferrel , 2013-01-17, 15:08
[expand - 11 more] - Solr-recommender for Mahout 0.9 - Mahout - [mail # user]
...One difference is that a “text” field has analyzers like Porter stemming applied. I had to take these out of the schema.xml. I think TFIDF is also applied to the tems in “text” but may not b...
   Author: Pat Ferrel , 2013-11-07, 17:44
[expand - 1 more] - Decaying score for old preferences when using the .refresh() - Mahout - [mail # user]
...Not sure how you are going to decay in Mahout. Once ingested into Mahout there are no timestamps. So you’ll have to do that before ingesting.  Last year we set up an ecom-department sto...
   Author: Pat Ferrel , 2013-11-07, 20:08
Thoughts and Questions on a e-Commerce Recommender System and Expired Items - Mahout - [mail # user]
...If you have a lot of old historical data for products that no longer exist you may be getting recommendations from that set. Using the old data is, in principal fine and should make recs bet...
   Author: Pat Ferrel , 2013-11-06, 21:54