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Re: Implicit preferences - Mahout - [mail # user]
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...I think you'd have to hack the code to not exclude previously-seen items, or at least, not of the type you wish to consider. Yes you would also have to hack it to add rather than replace exi...
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Author: Sean Owen,
2013-02-10, 16:55
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Re: Rating scale - Mahout - [mail # user]
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...Scaling values scales errors, yes. Yes you would have to normalize by a range to meaningfully compare. On Feb 6, 2013 2:58 PM, "Zia mel" wrote: ...
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Author: Sean Owen,
2013-02-06, 15:53
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Re: Rating scale - Mahout - [mail # user]
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...Yes that would be valid in the sense that the neighborhood based approaches are outputting a weighted average of prices here which is also a price. You would have to think about which simila...
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Author: Sean Owen,
2013-02-06, 10:04
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Re: Threshold-based neighborhood and getReach - Mahout - [mail # user]
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...You are asking for a smaller and smaller neighborhood around a user. At some point the neighborhood includes no users, for some people -- or, the neighborhood includes no new items. Nothing ...
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Author: Sean Owen,
2013-02-04, 16:31
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Re: Failed to execute goal Surefire plugin -- any ideas? - Mahout - [mail # user]
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...You can -DskipTests to skip tests, since that's what it is complaining about. There aren't any current failures in trunk so could be something specific to your setup. Or a flaky test. It may...
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Author: Sean Owen,
2013-02-04, 16:28
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Re: Rating scale - Mahout - [mail # user]
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...You don't have to fix a scale. But your data needs to be consistent. It wouldn't work to have users rate on a 1-5 scale one day, and 1-100 tomorrow (unless you go back and normalize the old ...
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Author: Sean Owen,
2013-02-04, 16:27
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Re: Server sizing Hadoop + Mahout - Mahout - [mail # user]
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...The problem with this POV is that it assumes it's obvious what the right outcome is. With a transaction test or a disk write test or big sort, it's obvious and you can make a benchmark. With...
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Author: Sean Owen,
2013-02-02, 16:01
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Re: (near) real time recommender/predictor - Mahout - [mail # user]
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...It's a good question. I think you can achieve a partial solution in Mahout. "Real-time" suggests that you won't be able to make use of Hadoop-based implementations, since they are by n...
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Author: Sean Owen,
2013-01-31, 19:57
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Re: Using setPreference() to update recommendations in DataModel in Memory - Mahout - [mail # user]
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...It throws an exception except in a few implementations, mostly the ones based on a database. It isn't something that's really used -- you instead update the backing store indirectly. Yes, th...
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Author: Sean Owen,
2013-01-30, 08:43
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Re: Boolean preferences and evaluation - Mahout - [mail # user]
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...No, this is usually discussed under the name "implicit feedback" in the literature. On Wed, Jan 30, 2013 at 2:49 AM, Zia mel wrote:...
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Author: Sean Owen,
2013-01-30, 08:37
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