Package org.apache.mahout.math.hadoop.stochasticsvd

Class Summary

Class	Description
ABtDenseOutJob	Computes ABt products, then first step of QR which is pushed down to the reducer.
ABtDenseOutJob.ABtMapper	So, here, i preload A block into memory.
ABtDenseOutJob.QRReducer	QR first step pushed down to reducer.
ABtJob	Computes ABt products, then first step of QR which is pushed down to the reducer.
ABtJob.ABtMapper	So, here, i preload A block into memory.
ABtJob.QRReducer	QR first step pushed down to reducer.
BtJob	Bt job.
BtJob.BtMapper
BtJob.OuterProductCombiner
BtJob.OuterProductReducer
DenseBlockWritable	Ad-hoc substitution for MatrixWritable.
Omega	simplistic implementation for Omega matrix in Stochastic SVD method
QJob	Compute first level of QHat-transpose blocks.
QJob.QMapper
SparseRowBlockAccumulator	Aggregate incoming rows into blocks based on the row number (long).
SparseRowBlockWritable	block that supports accumulating rows and their sums , suitable for combiner and reducers of multiplication jobs.
SplitPartitionedWritable	a key for vectors allowing to identify them by their coordinates in original split of A.
SplitPartitionedWritable.SplitGroupingComparator
SSVDCli	Mahout CLI adapter for SSVDSolver
SSVDHelper	set of small file manipulation helpers.
SSVDSolver	Stochastic SVD solver (API class).
UJob	Computes U=Q*Uhat of SSVD (optionally adding x pow(Sigma, 0.5) )
UJob.UMapper
VJob
VJob.VMapper
YtYJob	Job that accumulates Y'Y output
YtYJob.YtYMapper
YtYJob.YtYReducer