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Re: Odd vector iteration behavior - Mahout - [mail # dev]
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...It should be pretty easy to check via a new unit test if this iteration / changing values interleaved operation works. It's hard to tell if indexOfInsertion() is implemented completely...
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Author: Jake Mannix,
2013-04-15, 18:02
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Re: PlusMult and other functions - Mahout - [mail # dev]
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...So we should make sure that we don't bite ourselves with any primitive object boxing when interfacing nicely with guava... It should be fine, but there are places where it will n...
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Author: Jake Mannix,
2013-04-12, 22:15
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Re: Odd vector iteration behavior - Mahout - [mail # dev]
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...I think requiring the caller to know to copy/clone the element to be allowed to call hasNext() multiple times is extremely non-intuitive. Having the caller know that it's dangerous / n...
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Author: Jake Mannix,
2013-04-12, 22:07
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Re: Odd vector iteration behavior - Mahout - [mail # dev]
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...This looks very wrong. The iterators for SASV extend guava's AbstractIterator, but they do reuse the NonDefaultElement instance internally. It *looks* like we're correctly satis...
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Author: Jake Mannix,
2013-04-12, 18:05
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Re: Horrible performance with SequentialAccessSparseVector - Mahout - [mail # dev]
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...Yeah, this has been a nasty nasty fact forever, and I should read your patch more carefully, it looks like you're doing the "if the function preserves zero, apply it sparsely" trick, which i...
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Author: Jake Mannix,
2013-04-11, 04:29
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Re: Horrible performance with SequentialAccessSparseVector - Mahout - [mail # dev]
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...SequentialAccessSparseVector should really *never* be used in a mutating way. You should use RandomAccessSparseVector if you're going to mutate, and then *freeze* the results in a SASV...
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Author: Jake Mannix,
2013-04-11, 04:21
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Re: Cloudera ML: New Open Source Libraries and Tools for Data Scientists - Mahout - [mail # dev]
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...Josh posted to the Crunch list about this: the idea was to intentionally *not* make Crunch depend on Mahout, nor Mahout depend on Crunch, but have a new project which depended on both. ...
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Author: Jake Mannix,
2013-03-29, 13:27
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[REPORT] Apache Mahout - Mahout - [mail # dev]
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...=== Apache Mahout Status Report: March 2013 == Apache Mahout provides implementations of machine learning algorithms (collaborative filtering, clustering, classification, and more) for...
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Author: Jake Mannix,
2013-03-16, 16:36
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Re: mahout collections updates - Mahout - [mail # dev]
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...so we're comparing to the following, hopefully? double result = 0.0; Iterator iter = iterateNonZero(); while (iter.hasNext()) { ...
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Author: Jake Mannix,
2013-03-12, 23:14
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Re: mahout collections updates - Mahout - [mail # dev]
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...Ok now that's even weirder than I thought! You're still calling vector methods, you're not doing direct array access or anything... On Tuesday, March 12, 2013, Sebastian Schelter...
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Author: Jake Mannix,
2013-03-12, 22:18
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