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Re: ALS-WR on Million Song dataset - Mahout - [mail # user]
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...One word of caution, is that there are at least two papers on ALS and they define lambda differently. I think you are talking about "Collaborative Filtering for Implicit Feedback Datasets". ...
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Author: Sean Owen,
2013-03-18, 16:47
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Re: Boosting User-Based with the user's attributes - Mahout - [mail # user]
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...There is a difference between the recommender and the similarity metric it uses. My suggestion was to either use your item data with the recommender and hobby data with the similarity metric...
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Author: Sean Owen,
2013-03-18, 13:54
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Re: Boosting User-Based with the user's attributes - Mahout - [mail # user]
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...You would have to make up the similarity metric separately since it depends entirely on how you want to define it. The part of the book you are talking about concerns rescoring, which is not...
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Author: Sean Owen,
2013-03-18, 13:23
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Re: reproducibility - Mahout - [mail # user]
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...If an algorithm has a stochastic/random element, no it won't necessarily produce the same result, by design. If you can fix the seed of the random number generator, you should get the same r...
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Author: Sean Owen,
2013-03-17, 13:57
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Re: reproducibility - Mahout - [mail # user]
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...What's your question? ALS has a random starting point which changes the results a bit. Not sure about KNN though. On Sun, Mar 17, 2013 at 3:03 AM, Koobas wrote: ...
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Author: Sean Owen,
2013-03-17, 12:46
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Re: Boosting User-Based with the user's attributes - Mahout - [mail # user]
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...There are many ways to think about combining these two types of data. If you can make some similarity metric based on age, gender and interests, then you can use it as the similarity m...
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Author: Sean Owen,
2013-03-16, 12:41
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Re: QR decomposition in ALS-WR code - Mahout - [mail # user]
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...I think you are referring to the same step? QR decomposition is how you solve for u_i which is what I imagine the same step you have in mind....
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Author: Sean Owen,
2013-03-15, 11:20
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Re: Discussion Of ML environment/MR, Mahout - Mahout - [mail # dev]
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...On Wed, Mar 13, 2013 at 7:41 PM, Sebastian Schelter wrote: That's all true but would you imagine I/O is 97.5% of the run-time? A 100-feature vector is 400 bytes, but to compute ...
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Author: Sean Owen,
2013-03-14, 16:02
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Re: Mahout and Hadoop 2 - Mahout - [mail # user]
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...I think someone submitted a different build profile that changes the dependencies for you. I believe the issue is using "hadoop-common" and not "hadoop-core" as well as changing versions. I ...
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Author: Sean Owen,
2013-03-13, 20:13
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Re: Discussion Of ML environment/MR, Mahout - Mahout - [mail # dev]
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...I think "just classifiers on just Hadoop" is enough for a project. I think "most ML on just Hadoop" is quite a big project, and even that hasn't nearly been completed here. I think "most ML ...
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Author: Sean Owen,
2013-03-13, 19:55
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