org.apache.ignite.ml.math.primitives.matrix.impl

Class SparseMatrix

java.lang.Object

org.apache.ignite.ml.math.primitives.matrix.AbstractMatrix

org.apache.ignite.ml.math.primitives.matrix.impl.SparseMatrix

All Implemented Interfaces:

Externalizable, Serializable, Destroyable, MetaAttributes, Matrix, StorageConstants, StorageOpsMetrics

public class SparseMatrix
extends AbstractMatrix
implements StorageConstants

Sparse local onheap matrix with SparseVector as rows.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.ignite.ml.math.primitives.matrix.Matrix

Matrix.Element

Field Summary

Fields inherited from interface org.apache.ignite.ml.math.StorageConstants

COLUMN_STORAGE_MODE, RANDOM_ACCESS_MODE, ROW_STORAGE_MODE, SEQUENTIAL_ACCESS_MODE, UNKNOWN_STORAGE_MODE

Constructor Summary

Constructors

Constructor and Description
SparseMatrix()
SparseMatrix(int rows, int cols) Construct new SparseMatrix.

Method Summary

Modifier and Type	Method and Description
void	compute(int row, int col, IgniteTriFunction<Integer,Integer,Double,Double> f) Replace matrix entry with value oldVal at (row, col) with result of computing f(row, col, oldVal).
Matrix	copy() Clones this matrix.
it.unimi.dsi.fastutil.ints.Int2ObjectArrayMap<it.unimi.dsi.fastutil.ints.IntSet>	indexesMap()
Matrix	like(int rows, int cols) Creates new empty matrix of the same underlying class but of different size.
Vector	likeVector(int crd) Creates new empty vector of compatible properties (similar or the same flavor) to this matrix.
int	nonZeroElements() Gets number of non-zero elements in this matrix.

Methods inherited from class org.apache.ignite.ml.math.primitives.matrix.AbstractMatrix

allSpliterator, assign, assign, assign, assign, assignColumn, assignRow, columnSize, density, destroy, divide, equals, foldColumns, foldMap, foldRows, get, getCol, getElement, getMetaStorage, getRow, getStorage, getX, guid, hashCode, isArrayBased, isDense, isDistributed, isRandomAccess, isSequentialAccess, map, map, maxElement, maxValue, minElement, minus, minValue, nonZeroSpliterator, plus, plus, readExternal, rowSize, set, setColumn, setRow, setStorage, setX, storageGet, storageSet, sum, swapColumns, swapRows, times, times, times, toString, transpose, viewColumn, viewDiagonal, viewRow, writeExternal

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.ignite.ml.math.StorageConstants

assertAccessMode, assertStorageMode

Methods inherited from interface org.apache.ignite.ml.math.MetaAttributes

getAttribute, hasAttribute, removeAttribute, setAttribute

Constructor Detail

SparseMatrix

public SparseMatrix()

SparseMatrix

public SparseMatrix(int rows,
                    int cols)

Construct new SparseMatrix. By default storage sets in row optimized mode and in random access mode.

Method Detail

like

public Matrix like(int rows,
                   int cols)

Creates new empty matrix of the same underlying class but of different size.

NOTE: new matrix will have the same flavor as the this matrix but a different ID.

Specified by:

like in interface Matrix

Parameters:

rows - Number of rows for new matrix.

cols - Number of columns for new matrix.

Returns:

New matrix of the same underlying class and size.

likeVector

public Vector likeVector(int crd)

Creates new empty vector of compatible properties (similar or the same flavor) to this matrix.

Specified by:

likeVector in interface Matrix

Parameters:

crd - Cardinality of the vector.

Returns:

Newly created empty vector "compatible" to this matrix.

nonZeroElements

public int nonZeroElements()

Gets number of non-zero elements in this matrix.

Specified by:

nonZeroElements in interface Matrix

Overrides:

nonZeroElements in class AbstractMatrix

Returns:

Number of non-zero elements in this matrix.

indexesMap

public it.unimi.dsi.fastutil.ints.Int2ObjectArrayMap<it.unimi.dsi.fastutil.ints.IntSet> indexesMap()

copy

public Matrix copy()

Clones this matrix.

NOTE: new matrix will have the same flavor as the this matrix but a different ID.

Specified by:

copy in interface Matrix

Overrides:

copy in class AbstractMatrix

Returns:

New matrix of the same underlying class, the same size and the same values.

compute

public void compute(int row,
                    int col,
                    IgniteTriFunction<Integer,Integer,Double,Double> f)

Replace matrix entry with value oldVal at (row, col) with result of computing f(row, col, oldVal).

Specified by:

compute in interface Matrix

Overrides:

compute in class AbstractMatrix

Parameters:

row - Row.

col - Column.

f - Function used for replacing.