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Re: Problems with KMeans Clustering - Radius calculation returns incorrect ZERO value in some cases. - Mahout - [mail # user]
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...What you have observed is correct. During the final iteration, points are observed by each cluster and these observations are used to calculate the new cluster center and radius....
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Author: Jeff Eastman,
2013-05-15, 17:15
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Re: Problems with KMeans Clustering - Radius calculation returns incorrect ZERO value in some cases. - Mahout - [mail # user]
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...Hi Erinn, The radius calculation in KMeans and other clustering algorithms uses a running sums algorithm (see RunningSumsGaussianAccumulator) and the radius is really the s...
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Author: Jeff Eastman,
2013-05-14, 17:09
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Re: Fuzyy Clustering accumulates lots of memory - Mahout - [mail # user]
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...Fuzzy KMeans will use a lot of heap memory because every vector is observed (with weighting) by every cluster. This will make the cluster centers (and other vectors) much more de...
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Author: Jeff Eastman,
2013-03-29, 16:11
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Re: Retrieving Fuzzy Cluster Probabilities - Mahout - [mail # user]
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...On 3/22/13 10:39 AM, Sebastian Briesemeister wrote: It sounds like you may have found a bug in the MR version. Those probabilities should be the same. The pdf vectors are normalized I ...
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Author: Jeff Eastman,
2013-03-22, 15:17
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Re: [Draft] Board Report - Mahout - [mail # dev]
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...+1 Even though new development has slowed lately it still paints a favorable picture from the adoption side On 3/11/13 2:38 PM, Ted Dunning wrote: ...
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Author: Jeff Eastman,
2013-03-11, 19:09
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Re: KMean cluster produces more clusters then requested - Mahout - [mail # user]
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...Unfortunately, all attachments are stripped by the Apache mail server. You will need to open a JIRA to get those attachments to us. You could; however, also tell us a bit more ab...
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Author: Jeff Eastman,
2013-03-09, 14:38
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Re: KMeans Throwing Hadoop write errors for large values of K - Mahout - [mail # user]
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...I don't know where the timeout is happening, but each mapper and each reducer writes all its clusters out at the end of its run. With a large number of clusters, and with the non...
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Author: Jeff Eastman,
2013-03-08, 21:01
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Re: How to pick t1 and t2 in canopy - Mahout - [mail # user]
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...This is a common question and you can search the email archives for more discussion. Start by setting t1 == t2 as t2 is the variable that controls the number of clusters produced...
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Author: Jeff Eastman,
2013-03-07, 13:55
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Re: how to use a custom distance measure with kmeans? - Mahout - [mail # user]
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...You also need to specify a fully-qualified class name On 2/12/13 11:48 AM, Dan Filimon wrote: ...
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Author: Jeff Eastman,
2013-02-12, 18:12
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Re: Early version of streaming k-means in Mahout - Mahout - [mail # dev]
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...The Job classes in examples are very, very old carryovers from a time before our Drivers had a CLI. Just follow the current pattern, extending AbstractJob. On 2/11/13 3:00 ...
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Author: Jeff Eastman,
2013-02-12, 18:10
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