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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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Re: streaming k-means vs minibatch k-means - Mahout - [mail # dev]
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... don't fully understand the math behind it so I can't comment further. Ted? For now, I'd like to get the Hadoop version committed. I've heard really positive things about Spark but haven...
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Author: Dan Filimon,
2013-03-28, 21:47
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Re: Call to action – Mahout needs your help - Mahout - [mail # dev]
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... a notorious optimist I'm confident that we should be in a good position to provide answers for that question now. One thing that has always been on my mind is to focus on a handful of core use...
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Author: Isabel Drost,
2013-03-25, 09:31
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ObjectArrayList # set(int index, T element) - Mahout - [javadoc]
- [see source code]
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...Replaces the element at the specified position in the receiver with the specified element. @param index index of element to replace. @param element element to be stored at the specified...
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... position. @throws IndexOutOfBoundsException index is out of range (index < 0 || index >= size()). ...
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http://search-lucene.com/jd/mahout/math/org.../ObjectArrayList.html#set(int, T)
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Preference # getValue() - Mahout - [javadoc]
- [see source code]
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... @return strength of the preference for that item. Zero should indicate "no preference either way";
positive values indicate preference and negative values indicate dislike ...
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http://search-lucene.com/jd/mahout/core/org/apach.../Preference.html#getValue()
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FixedRunningAverage - Mahout - [javadoc]
- [see source code]
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...
A simple class that represents a fixed value of an average and count. This is useful
when an API needs to return {@link RunningAverage} but is not in a position to accept
updates to it.
...
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http://search-lucene.com/jd/mahout/core/org/apache/.../FixedRunningAverage.html
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GradientMachine # regularization(double regularization) - Mahout - [javadoc]
- [see source code]
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...Chainable configuration option. @param regularization A positive value that controls the weight vector size. @return This, so other configurations can be chained. ...
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http://search-lucene.com/jd/maho.../GradientMachine.html#regularization(double)
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Re: threshold assignment / selection - Mahout - [mail # user]
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...It's fairly arbitrary. Strong positive ratings are probably more than merely "above average", but you could define the threshold higher or lower if you wanted. It's a good default. On Tue...
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Author: Sean Owen,
2013-01-15, 16:01
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NegativeBinomial # NegativeBinomial(int r, double p, java.util.Random randomGenerator) - Mahout - [javadoc]
- [see source code]
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...Constructs a Negative Binomial distribution which describes the probability of getting
a particular number of negative trials (k) before getting a fixed number of positive
trials (r) where...
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... each positive trial has probability (p) of being successful. @param r the required number of positive trials. @param p the probability of success. @param random...
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http://search-lucene.com/jd/ma...egativeBinomial(int, double, java.util.Random)
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Auc - Mahout - [javadoc]
- [see source code]
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...Computes AUC and a few other accuracy statistics without storing huge amounts of data. This is
done by keeping uniform samples of the positive and negative scores. Then, when AUC...
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... is to be
computed, the remaining scores are sorted and a rank-sum statistic is used to compute the AUC.
Since AUC is invariant with respect to down-sampling of either positives or negatives, this is
close...
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[+ show more]
[- hide]
| ... to correct and is exactly correct if maxBufferSize or fewer positive and negative scores
are examined. ... |
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http://search-lucene.com/jd/mahout/core/org/apache/mahout/classifie.../Auc.html
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