Package com.apple.foundationdb.linear

Class ColumnMajorRealMatrix

java.lang.Object

com.apple.foundationdb.linear.ColumnMajorRealMatrix

All Implemented Interfaces:

LinearOperator, RealMatrix, VectorOperator

public class ColumnMajorRealMatrix
extends Object
implements RealMatrix

Constructor Summary

Constructors

Constructor	Description
ColumnMajorRealMatrix(double[][] data)

Method Summary

Modifier and Type	Method	Description
DoubleRealVector	apply(RealVector vector)	Apply this operator to the vector passed in.
final boolean	equals(Object o)
RowMajorRealMatrix	flipMajor()
double[]	getColumn(int column)
double[][]	getColumnMajorData()
double	getEntry(int row, int column)
int	getNumColumnDimensions()
int	getNumRowDimensions()
double[][]	getRowMajorData()
int	hashCode()
ColumnMajorRealMatrix	multiply(RealMatrix otherMatrix)	Multiplies this matrix by otherMatrix and returns the column-major product.
RowMajorRealMatrix	quickTranspose()
ColumnMajorRealMatrix	subMatrix(int startRow, int lengthRow, int startColumn, int lengthColumn)
ColumnMajorRealMatrix	toColumnMajor()
RowMajorRealMatrix	toRowMajor()
ColumnMajorRealMatrix	transpose()
DoubleRealVector	transposedApply(RealVector vector)

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.apple.foundationdb.linear.LinearOperator

getNumDimensions, invertedApply, isSquare

Methods inherited from interface com.apple.foundationdb.linear.RealMatrix

isTransposable, valueBasedHashCode, valueEquals

Methods inherited from interface com.apple.foundationdb.linear.VectorOperator

transform, untransform

Constructor Details

ColumnMajorRealMatrix

public ColumnMajorRealMatrix(@Nonnull
 double[][] data)

Method Details

getNumRowDimensions

public int getNumRowDimensions()

Specified by:

getNumRowDimensions in interface LinearOperator

getNumColumnDimensions

public int getNumColumnDimensions()

Specified by:

getNumColumnDimensions in interface LinearOperator

getEntry

public double getEntry(int row,
 int column)

Specified by:

getEntry in interface RealMatrix

getColumn

@Nonnull
public double[] getColumn(int column)

transpose

@Nonnull
public ColumnMajorRealMatrix transpose()

Specified by:

transpose in interface RealMatrix

apply

@Nonnull
public DoubleRealVector apply(@Nonnull
 RealVector vector)

Description copied from interface: VectorOperator

Apply this operator to the vector passed in.

Specified by:

apply in interface RealMatrix

Specified by:

apply in interface VectorOperator

Parameters:

vector - the vector

Returns:

a new vector

transposedApply

@Nonnull
public DoubleRealVector transposedApply(@Nonnull
 RealVector vector)

Specified by:

transposedApply in interface LinearOperator

Specified by:

transposedApply in interface RealMatrix

multiply

@Nonnull
public ColumnMajorRealMatrix multiply(@Nonnull
 RealMatrix otherMatrix)

Multiplies this matrix by otherMatrix and returns the column-major product.

Single universal AXPY fast path: each output column is built by accumulating this's contiguous columns scaled by the corresponding entries of B's column. Works regardless of B's layout because the only thing B contributes per inner step is a scalar from getEntry. See RowMajorRealMatrix.multiply(com.apple.foundationdb.linear.RealMatrix) for the longer story on why row-major A cannot share this shape and instead needs two specialized branches.

Specified by:

multiply in interface RealMatrix

Parameters:

otherMatrix - the right-hand operand; must satisfy otherMatrix.getNumRowDimensions() == this.getNumColumnDimensions()

Returns:

a new ColumnMajorRealMatrix containing the product

subMatrix

@Nonnull
public ColumnMajorRealMatrix subMatrix(int startRow,
 int lengthRow,
 int startColumn,
 int lengthColumn)

Specified by:

subMatrix in interface RealMatrix

toRowMajor

@Nonnull
public RowMajorRealMatrix toRowMajor()

Specified by:

toRowMajor in interface RealMatrix

getRowMajorData

@Nonnull
public double[][] getRowMajorData()

Specified by:

getRowMajorData in interface RealMatrix

toColumnMajor

@Nonnull
public ColumnMajorRealMatrix toColumnMajor()

Specified by:

toColumnMajor in interface RealMatrix

getColumnMajorData

@Nonnull
public double[][] getColumnMajorData()

Specified by:

getColumnMajorData in interface RealMatrix

quickTranspose

@Nonnull
public RowMajorRealMatrix quickTranspose()

Specified by:

quickTranspose in interface RealMatrix

flipMajor

@Nonnull
public RowMajorRealMatrix flipMajor()

Specified by:

flipMajor in interface RealMatrix

equals

public final boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object