org.apache.spark.mllib.linalg

Class DenseMatrix

Object

org.apache.spark.mllib.linalg.DenseMatrix

All Implemented Interfaces:

java.io.Serializable, Matrix

public class DenseMatrix
extends Object
implements Matrix

Column-majored dense matrix. The entry values are stored in a single array of doubles with columns listed in sequence. For example, the following matrix

   1.0 2.0
   3.0 4.0
   5.0 6.0
 

is stored as [1.0, 3.0, 5.0, 2.0, 4.0, 6.0].

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
DenseMatrix(int numRows, int numCols, double[] values)

Method Summary

Methods

Modifier and Type	Method and Description
int	numCols() Number of columns.
int	numRows() Number of rows.
double[]	toArray() Converts to a dense array in column major.
double[]	values()

Methods inherited from class Object

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

Methods inherited from interface org.apache.spark.mllib.linalg.Matrix

apply, toString

Constructor Detail

DenseMatrix

public DenseMatrix(int numRows,
           int numCols,
           double[] values)

Method Detail

numRows

public int numRows()

Description copied from interface: Matrix

Number of rows.

Specified by:

numRows in interface Matrix

numCols

public int numCols()

Description copied from interface: Matrix

Number of columns.

Specified by:

numCols in interface Matrix

values

public double[] values()

toArray

public double[] toArray()

Description copied from interface: Matrix

Converts to a dense array in column major.

Specified by:

toArray in interface Matrix