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Re: Vector and Matrices - The Next Gen - Mahout - [mail # dev]
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... (Disabled SerializationBenchmark which doesn't seem to work with 0.7) and ran against 0.7. There is one regression. But rest have been pretty positive. On Sun, Apr 21, 2013 at 12:37 PM, Ted...
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Author: Robin Anil,
2013-05-05, 03:31
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Re: Can someone suggest an approach for calculating precision and recall for distributed recommendations? - Mahout - [mail # user]
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... as they reach the top 5 positions. If you want, it's a more 'global' measure, finding out if the final list delivered is right or not, while RMSE computes algorithm quality item by item. None...
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Author: Paulo Villegas,
2013-05-10, 11:56
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NonNegativeQuadraticOptimizer # optimize(double[][] matrix, double[] b) - Mahout - [javadoc]
- [see source code]
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...Non-negative Quadratic Optimization. @param matrix
matrix nxn positions @param b
vector b, n positions @return vector of n weights ...
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http://search-lucene.com/jd/ma...cOptimizer.html#optimize(double[][], double[])
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Re: Call to action – Mahout needs your help - Mahout - [mail # dev]
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... contributors positively b) won't break things too often (breaking the build sometimes is probably a good sign) c) will make significant contributions without leading the project into a situation...
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Author: Ted Dunning,
2013-03-26, 08:29
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Fwd: Category 0 in Model dissection - Mahout - [mail # user]
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..., Positive and Negative using AdaptiveLogisticRegression. When dissecting this model, to get the category on which a feature has a most impact, I followed the codes from org...
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....apache.mahout.classifier.sgd.SGDHelper, Line 74 (mahout-examples 0.7): ngNames.get(w.getMaxImpact() + 1). where ngNames is the label list (i.e. ["Positive", "Negative"]), and w is the Weight instance of a feature. However...
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| ..., the Weight class internally represents n labels using a vector with n-1 positions ( am I correct?) , so it seems impossible to retrieve category 0, if a feature has a most impact on it. Could anyone... |
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Author: Zheyi RONG,
2013-03-08, 14:04
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Data # get(int index) - Mahout - [javadoc]
- [see source code]
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...Returns the element at the specified position @param index
index of element to return @return the element at the specified position @throws Index...
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http://search-lucene.com/jd/mahout/core/org/apache/mahout.../Data.html#get(int)
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Re: Problems with Mahout's RecommenderIRStatsEvaluator - Mahout - [mail # user]
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.... Often the input has no positive or negative label (a click); everything is 'positive'. If you're predicting anything, it's not one target, but many targets, one per item, as if you have many...
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... of thing apply here. Viewed through the supervised lens, I suppose you could say that this process only ever predicts the positive class, and that's different. In fact it is not classifying given...
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| ... test examples at all... it's like it is telling you which of many classifiers (items) would be most likely to return the positive class On Sun, Feb 17, 2013 at 11:56 AM, Osman Başkaya wrote: ... |
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Author: Sean Owen,
2013-02-17, 14:05
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State # mutate() - Mahout - [javadoc]
- [see source code]
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...Clones this state with a random change in position. Copies the payload and
lets it know about the change. @return A new state. ...
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http://search-lucene.com/jd/mahout/core/org/apache/mahou.../State.html#mutate()
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Swapper - Mahout - [javadoc]
- [see source code]
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...Interface for an object that knows how to swap elements at two positions (a,b). ...
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http://search-lucene.com/jd/mahout/math/org/apache/mahout/math/Swapper.html
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CfP 2013 Workshop on Middleware for HPC and Big Data Systems (MHPC'13) - Mahout - [mail # user]
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..., to present research results, early research ideas, perspectives and positions of interest to the community. Lightning talks should spark discussion with presenters making themselves available...
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Author: MHPC 2013,
2013-04-25, 21:32
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