org.apache.spark.mllib.linalg.distributed

Class CoordinateMatrix

Object

org.apache.spark.mllib.linalg.distributed.CoordinateMatrix

All Implemented Interfaces:

java.io.Serializable, DistributedMatrix

public class CoordinateMatrix
extends Object
implements DistributedMatrix

:: Experimental :: Represents a matrix in coordinate format.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
CoordinateMatrix(RDD<MatrixEntry> entries) Alternative constructor leaving matrix dimensions to be determined automatically.
CoordinateMatrix(RDD<MatrixEntry> entries, long nRows, long nCols)

Method Summary

Methods

Modifier and Type	Method and Description
RDD<MatrixEntry>	entries()
long	numCols() Gets or computes the number of columns.
long	numRows() Gets or computes the number of rows.
IndexedRowMatrix	toIndexedRowMatrix() Converts to IndexedRowMatrix.
RowMatrix	toRowMatrix() Converts to RowMatrix, dropping row indices after grouping by row index.

Methods inherited from class Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CoordinateMatrix

public CoordinateMatrix(RDD<MatrixEntry> entries,
                long nRows,
                long nCols)

CoordinateMatrix

public CoordinateMatrix(RDD<MatrixEntry> entries)

Alternative constructor leaving matrix dimensions to be determined automatically.

Method Detail

entries

public RDD<MatrixEntry> entries()

numCols

public long numCols()

Gets or computes the number of columns.

Specified by:

numCols in interface DistributedMatrix

numRows

public long numRows()

Gets or computes the number of rows.

Specified by:

numRows in interface DistributedMatrix

toIndexedRowMatrix

public IndexedRowMatrix toIndexedRowMatrix()

Converts to IndexedRowMatrix. The number of columns must be within the integer range.

toRowMatrix

public RowMatrix toRowMatrix()

Converts to RowMatrix, dropping row indices after grouping by row index. The number of columns must be within the integer range.