org.apache.spark.mllib.linalg

Interface Matrix

All Superinterfaces:

java.io.Serializable

All Known Implementing Classes:

DenseMatrix, SparseMatrix

public interface Matrix
extends scala.Serializable

Trait for a local matrix.

Method Summary

Methods

Modifier and Type	Method and Description
double	apply(int i, int j) Gets the (i, j)-th element.
Matrix	copy() Get a deep copy of the matrix.
int	index(int i, int j) Return the index for the (i, j)-th element in the backing array.
DenseMatrix	multiply(DenseMatrix y) Convenience method for `Matrix`-`DenseMatrix` multiplication.
DenseVector	multiply(DenseVector y) Convenience method for `Matrix`-`DenseVector` multiplication.
int	numCols() Number of columns.
int	numRows() Number of rows.
double[]	toArray() Converts to a dense array in column major.
breeze.linalg.Matrix<Object>	toBreeze() Converts to a breeze matrix.
String	toString() A human readable representation of the matrix
DenseMatrix	transposeMultiply(DenseMatrix y) Convenience method for `Matrix`^T^-`DenseMatrix` multiplication.
DenseVector	transposeMultiply(DenseVector y) Convenience method for `Matrix`^T^-`DenseVector` multiplication.
void	update(int i, int j, double v) Update element at (i, j)

Method Detail

numRows

int numRows()

Number of rows.

numCols

int numCols()

Number of columns.

toArray

double[] toArray()

Converts to a dense array in column major.

toBreeze

breeze.linalg.Matrix<Object> toBreeze()

Converts to a breeze matrix.

apply

double apply(int i,
           int j)

Gets the (i, j)-th element.

index

int index(int i,
        int j)

Return the index for the (i, j)-th element in the backing array.

update

void update(int i,
          int j,
          double v)

Update element at (i, j)

copy

Matrix copy()

Get a deep copy of the matrix.

multiply

DenseMatrix multiply(DenseMatrix y)

Convenience method for `Matrix`-`DenseMatrix` multiplication.

multiply

DenseVector multiply(DenseVector y)

Convenience method for `Matrix`-`DenseVector` multiplication.

transposeMultiply

DenseMatrix transposeMultiply(DenseMatrix y)

Convenience method for `Matrix`^T^-`DenseMatrix` multiplication.

transposeMultiply

DenseVector transposeMultiply(DenseVector y)

Convenience method for `Matrix`^T^-`DenseVector` multiplication.

toString

String toString()

A human readable representation of the matrix

Overrides:

toString in class Object