Uses of Class
org.apache.sysml.runtime.matrix.data.SparseBlock

Packages that use SparseBlock

Package	Description
org.apache.sysml.runtime.matrix.data

Uses of SparseBlock in org.apache.sysml.runtime.matrix.data

Subclasses of SparseBlock in org.apache.sysml.runtime.matrix.data

Modifier and Type	Class and Description
class	SparseBlockCOO SparseBlock implementation that realizes a traditional 'coordinate matrix' representation, where the entire sparse block is stored as triples in three arrays: row indexes, column indexes, and values, where row indexes and colunm indexes are sorted in order to allow binary search.
class	SparseBlockCSR SparseBlock implementation that realizes a traditional 'compressed sparse row' representation, where the entire sparse block is stored as three arrays: ptr of length rlen+1 to store offsets per row, and indexes/values of length nnz to store column indexes and values of non-zero entries.
class	SparseBlockMCSR SparseBlock implementation that realizes a 'modified compressed sparse row' representation, where each compressed row is stored as a separate SparseRow object which provides flexibility for unsorted row appends without the need for global reshifting of values/indexes but it incurs additional memory overhead per row for object/array headers per row which also slows down memory-bound operations due to higher memory bandwidth requirements.

Fields in org.apache.sysml.runtime.matrix.data declared as SparseBlock

Modifier and Type	Field and Description
protected SparseBlock	MatrixBlock.sparseBlock

Methods in org.apache.sysml.runtime.matrix.data that return SparseBlock

Modifier and Type	Method and Description
static SparseBlock	SparseBlockFactory.copySparseBlock(SparseBlock.Type type, SparseBlock sblock, boolean forceCopy)
static SparseBlock	SparseBlockFactory.createSparseBlock(int rlen)
static SparseBlock	SparseBlockFactory.createSparseBlock(SparseBlock.Type type, int rlen)
static SparseBlock	SparseBlockFactory.createSparseBlock(SparseBlock.Type type, SparseRow row)
SparseBlock	MatrixBlock.getSparseBlock()

Methods in org.apache.sysml.runtime.matrix.data with parameters of type SparseBlock

Modifier and Type	Method and Description
void	MatrixBlock.appendRowToSparse(SparseBlock dest, MatrixBlock src, int i, int rowoffset, int coloffset, boolean deep)
static SparseBlock	SparseBlockFactory.copySparseBlock(SparseBlock.Type type, SparseBlock sblock, boolean forceCopy)
static SparseBlock.Type	SparseBlockFactory.getSparseBlockType(SparseBlock sblock)
boolean	SparseBlock.isAligned(int r, SparseBlock that) Indicates if all non-zero values of row r are aligned with the same row of the given second sparse block instance, which can be exploited for more efficient operations.
boolean	SparseBlock.isAligned(SparseBlock that) Indicates if all non-zero values are aligned with the given second sparse block instance, which can be exploited for more efficient operations.
static boolean	SparseBlockFactory.isSparseBlockType(SparseBlock sblock, SparseBlock.Type type)
long	MatrixBlockDataInput.readSparseRows(int rlen, long nnz, SparseBlock rows) Reads the sparse rows array from the data input into a sparse block and returns the number of non-zeros.
void	SparseBlockCSR.setIndexRange(int rl, int ru, int cl, int cu, SparseBlock sb) Inserts a sparse block into the row and column range [rl,ru) and [cl,cu).
void	MatrixBlock.setSparseBlock(SparseBlock sblock)
void	MatrixBlockDataOutput.writeSparseRows(int rlen, SparseBlock rows) Writes the sparse rows array of a sparse block to the data output.

Constructors in org.apache.sysml.runtime.matrix.data with parameters of type SparseBlock

Constructor and Description
MatrixBlock(int rl, int cl, long nnz, SparseBlock sblock) Constructs a sparse MatrixBlock with a given instance of a SparseBlock
SparseBlockCOO(SparseBlock sblock) Copy constructor sparse block abstraction.
SparseBlockCSR(SparseBlock sblock) Copy constructor sparse block abstraction.
SparseBlockMCSR(SparseBlock sblock) Copy constructor sparse block abstraction.