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[MAHOUT-986] OutOfMemoryError in LanczosState by way of SpectralKMeans - Mahout - [issue]
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... an eigen-decomposition of the graph laplacian. For those who are more knowledgeable in the linear systems solvers of Mahout than I, can the Lanczos parameters be tweaked to negate the requirement...
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http://issues.apache.org/jira/browse/MAHOUT-986
Author: Shannon Quinn,
2012-06-16, 10:35
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Re: Low-rank transition matrix approximation - Mahout - [mail # dev]
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... since there won't be an edge. The algorithm uses a slightly adjusted version of the transition matrix, one which has a more stable eigen-decomposition. It's not quite as sparse as the one I...
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Author: Shannon Quinn,
2010-07-20, 16:23
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Low-rank transition matrix approximation - Mahout - [mail # dev]
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...-rank sparse approximations of the full markov transition matrix in order to speed up computation of the eigendecomposition (since there is a bottleneck in that the decomposition is performed at every...
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Author: Shannon Quinn,
2010-07-12, 23:38
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IndexOutOfBoundsException in RandomSeedGenerator.buildRandom() - Mahout - [mail # dev]
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... second-to-last line of code. Right after performing an eigen-decomposition using the DistributedLanczosSolver, I feed the outputs directly into the KMeans utility, Random...
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Author: Shannon Quinn,
2010-06-18, 19:59
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Re: CLI input formats and calling other jobs - Mahout - [mail # dev]
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...-symmetric affinity/similarity matrices, though this equates to a non-trivial stochastic decomposition...so for the time being, I'm assuming symmetric :P Sticking with SequenceFile is the way to go...
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Author: Shannon Quinn,
2010-06-10, 02:14
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CLI input formats and calling other jobs - Mahout - [mail # dev]
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... this involves implementing a new UnaryFunction? Or does a method already exist (aside from manually looping over the matrix diagonal)? 4) Perform eigen-decomposition on L. This is where Distributed...
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Author: Shannon Quinn,
2010-06-09, 05:31
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