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Re: cross recommender - Mahout - [mail # user]
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...I think that this is OK for cross recommendation. We have user x term (the query history) And we have user x sku (the click history). We don't even care if the click came from...
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Author: Ted Dunning,
2013-04-16, 22:09
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Re: cross recommender - Mahout - [mail # user]
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...Primary action can be emitting a search term. Secondary can be click to view. On Tue, Apr 16, 2013 at 4:53 PM, Pat Ferrel wrote: ...
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Author: Ted Dunning,
2013-04-16, 17:29
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Re: cross recommender - Mahout - [mail # user]
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...Log-likelihood similarity is a bit of a force-fit of the concept of the LLR. It is basically a binarizing and sparsifying filter applied to cooccurrence counts. As such, it is em...
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Author: Ted Dunning,
2013-04-12, 22:03
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Re: cross recommender - Mahout - [mail # user]
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...On Wed, Apr 10, 2013 at 10:38 AM, Pat Ferrel wrote: I don't....
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Author: Ted Dunning,
2013-04-10, 22:48
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Re: cross recommender - Mahout - [mail # user]
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...On Sat, Apr 6, 2013 at 3:26 PM, Pat Ferrel wrote: Well.... rows of B and A should match so columns of B' and rows of A rather than the reverse. Yes. Exactly. ...
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Author: Ted Dunning,
2013-04-08, 21:31
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Re: cross recommender - Mahout - [mail # user]
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... On Apr 4, 2013, at 5:17 PM, Pat Ferrel wrote: As I mentioned in the other response I sent, only the user id's need to match. Any item whose column in B is all zero cannot be recommended...
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... is probably rare and in any case, we know nothing about it. Any zero row of either A or B will case that user's behavior to be ignored for the purposes of cross recommendation. That is, again...
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Author: Ted Dunning,
2013-04-05, 12:54
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Re: cross recommender - Mahout - [mail # user]
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...-mind. But you are right about (B'A) A' being historical recommendations for everybody in A. Actually, I think that B'A has rows taken from the b-items and columns taken from the a-items. Each row...
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... of B'A consists of a row of indicators that lead to the recommendation of the item corresponding to that row. This is a very handy form that needn't be further transformed. I don't see why...
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Author: Ted Dunning,
2013-04-05, 12:49
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Re: cross recommender - Mahout - [mail # user]
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...This may not quite be true because the RSJ is able to take some liberties. The origin of these is that A'A can be viewed as a self join. Thus as rows of A are read, the cooccurre...
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Author: Ted Dunning,
2013-04-05, 13:04
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Re: cross recommender - Mahout - [mail # user]
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...Sebastian, What about the assumption that the matrix is symmetric? A'A is symmetric, but B'A is not. On Wed, Apr 3, 2013 at 12:08 AM, Sebastian Schelter <[EMAIL PROTECT...
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Author: Ted Dunning,
2013-04-03, 06:33
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Re: recommendations - Mahout - [mail # user]
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...These are examples of what I call cross-recommendation where you have user x item1 and user x item2 data and you want item1 => item2 recommendations. All of the standard techniques apply...
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... (user-based, LLR cooccurrence, SVD, latent factor models), but you have to rejigger things here and there. Sean, can Mahout's recommendation system do this cross recommendation? On Sun, Aug 29...
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Author: Ted Dunning,
2010-08-29, 18:26
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