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[expand - 3 more] - "LLR with time" - Mahout - [mail # user]
...Regarding overfitting, don't forget dithering. That can be the mostimportant single step you take in building a good recommender.Dithering can be inversely proportional to amount of exposure...
   Author: Ted Dunning , 2017-11-13, 02:33
distributed cholesky on mahout - Mahout - [mail # user]
...There was a variant of cholesky decomposition in Mahout at one time not solong ago. I would guess that it is still there.It is difficult to make a truly distributed version of QR decompositi...
   Author: Ted Dunning , 2018-04-19, 15:10
[expand - 6 more] - Bay Area Mahout Meetup Dec. 7? - Mahout - [mail # user]
...Correct.  Also, make sure you look on your map device in San Jose.  On Tue, Dec 7, 2010 at 5:39 PM, Lance Norskog  wrote:  > Zanker, not Zankar: > > 2860 Zankar ...
   Author: Ted Dunning , 2010-12-08, 01:56
[expand - 1 more] - [mahout-user] Recommendation engine to support a LAMP application - Mahout - [mail # user]
...You just reached him.  He is in the London time zone and will see your message shortly.  2010/12/7 José Moreira   > Sean Owen was providing that kind of support, how can i ...
   Author: Ted Dunning , 2010-12-08, 01:58
[expand - 1 more] - 7 Dec Mahout meet update - Mahout - [mail # user]
...I will post a summary.  On Tue, Dec 7, 2010 at 5:57 PM, Divya  wrote:  > It would be great if we get update of Mahout meet, for the people who could > not attend it. >...
   Author: Ted Dunning , 2010-12-08, 01:58
[expand - 1 more] - seq2sparse and lsi fold-in - Mahout - [mail # user]
...There are two dictionary-like systems in Mahout.  Neither is quite right.  The simpler one is in org.apache.mahout.vectorizer.encoders.Dictionary.  It doesn't do the frequency...
   Author: Ted Dunning , 2010-12-30, 21:04
A few questions regarding content-based recommenders - Mahout - [mail # user]
...The SGD classification system can actually be used to learn these combinations.  On Fri, Dec 31, 2010 at 4:17 PM, Lance Norskog  wrote:  > Production recommendation systems...
   Author: Ted Dunning , 2011-01-01, 01:19
[expand - 4 more] - SVM classifier - Mahout - [mail # user]
...Dmitriy is completely correct.  My only goal was to have a reader of the mailing list be able to find the wiki pages the want to read.  It wouldn't hurt to have those wiki pages cl...
   Author: Ted Dunning , 2010-12-06, 22:37
[expand - 3 more] - Inconsistent recommendations - Mahout - [mail # user]
...My experience is that users like to see recommendations that change.  In fact, this preference is strong enough that I now typically add jitter to the recommendations that I return. &nb...
   Author: Ted Dunning , 2009-06-03, 21:23
[expand - 1 more] - syntheticcontroldata clustering example failure due to combiner - Mahout - [mail # user]
...For L_2 centroids, you just have to have the mapper emit a trivial sum and a count (of 1).  The combiner should take a list of vector sums and counts and produce a combined sum and coun...
   Author: Ted Dunning , 2009-06-11, 19:54