org.ejml.alg.dense.decomposition.bidiagonal

Class BidiagonalDecompositionRow_D64

java.lang.Object

org.ejml.alg.dense.decomposition.bidiagonal.BidiagonalDecompositionRow_D64

All Implemented Interfaces:

org.ejml.interfaces.decomposition.BidiagonalDecomposition<org.ejml.data.DenseMatrix64F>, org.ejml.interfaces.decomposition.DecompositionInterface<org.ejml.data.DenseMatrix64F>

public class BidiagonalDecompositionRow_D64
extends java.lang.Object
implements org.ejml.interfaces.decomposition.BidiagonalDecomposition<org.ejml.data.DenseMatrix64F>

Performs a BidiagonalDecomposition using householder reflectors. This is efficient on wide or square matrices.

Constructor Summary

Constructors

Constructor and Description
BidiagonalDecompositionRow_D64()
BidiagonalDecompositionRow_D64(int numElements) Creates a decompose that defines the specified amount of memory.

Method Summary

Modifier and Type	Method and Description
protected void	computeU(int k)
protected void	computeV(int k)
boolean	decompose(org.ejml.data.DenseMatrix64F A) Computes the decomposition of the provided matrix.
org.ejml.data.DenseMatrix64F	getB(org.ejml.data.DenseMatrix64F B, boolean compact) Returns the bidiagonal matrix.
void	getDiagonal(double[] diag, double[] off)
double[]	getGammasU() Returns gammas from the householder operations for the U matrix.
double[]	getGammasV() Returns gammas from the householder operations for the V matrix.
org.ejml.data.DenseMatrix64F	getU(org.ejml.data.DenseMatrix64F U, boolean transpose, boolean compact) Returns the orthogonal U matrix.
org.ejml.data.DenseMatrix64F	getUBV() The raw UBV matrix that is stored internally.
org.ejml.data.DenseMatrix64F	getV(org.ejml.data.DenseMatrix64F V, boolean transpose, boolean compact) Returns the orthogonal V matrix.
static org.ejml.data.DenseMatrix64F	handleB(org.ejml.data.DenseMatrix64F B, boolean compact, int m, int n, int min)
static org.ejml.data.DenseMatrix64F	handleU(org.ejml.data.DenseMatrix64F U, boolean transpose, boolean compact, int m, int n, int min)
static org.ejml.data.DenseMatrix64F	handleV(org.ejml.data.DenseMatrix64F V, boolean transpose, boolean compact, int m, int n, int min)
protected void	init(org.ejml.data.DenseMatrix64F A) Sets up internal data structures and creates a copy of the input matrix.
boolean	inputModified()

Methods inherited from class java.lang.Object

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

Constructor Detail

BidiagonalDecompositionRow_D64

public BidiagonalDecompositionRow_D64(int numElements)

Creates a decompose that defines the specified amount of memory.

Parameters:

numElements - number of elements in the matrix.

BidiagonalDecompositionRow_D64

public BidiagonalDecompositionRow_D64()

Method Detail

decompose

public boolean decompose(org.ejml.data.DenseMatrix64F A)

Computes the decomposition of the provided matrix. If no errors are detected then true is returned, false otherwise.

Specified by:

decompose in interface org.ejml.interfaces.decomposition.DecompositionInterface<org.ejml.data.DenseMatrix64F>

Parameters:

A - The matrix that is being decomposed. Not modified.

Returns:

If it detects any errors or not.

init

protected void init(org.ejml.data.DenseMatrix64F A)

Sets up internal data structures and creates a copy of the input matrix.

Parameters:

A - The input matrix. Not modified.

getUBV

public org.ejml.data.DenseMatrix64F getUBV()

The raw UBV matrix that is stored internally.

Returns:

UBV matrix.

getDiagonal

public void getDiagonal(double[] diag,
                        double[] off)

Specified by:

getDiagonal in interface org.ejml.interfaces.decomposition.BidiagonalDecomposition<org.ejml.data.DenseMatrix64F>

getB

public org.ejml.data.DenseMatrix64F getB(org.ejml.data.DenseMatrix64F B,
                                         boolean compact)

Returns the bidiagonal matrix.

Specified by:

getB in interface org.ejml.interfaces.decomposition.BidiagonalDecomposition<org.ejml.data.DenseMatrix64F>

Parameters:

B - If not null the results are stored here, if null a new matrix is created.

Returns:

The bidiagonal matrix.

handleB

public static org.ejml.data.DenseMatrix64F handleB(org.ejml.data.DenseMatrix64F B,
                                                   boolean compact,
                                                   int m,
                                                   int n,
                                                   int min)

getU

public org.ejml.data.DenseMatrix64F getU(org.ejml.data.DenseMatrix64F U,
                                         boolean transpose,
                                         boolean compact)

Returns the orthogonal U matrix.

Specified by:

getU in interface org.ejml.interfaces.decomposition.BidiagonalDecomposition<org.ejml.data.DenseMatrix64F>

Parameters:

U - If not null then the results will be stored here. Otherwise a new matrix will be created.

Returns:

The extracted Q matrix.

handleU

public static org.ejml.data.DenseMatrix64F handleU(org.ejml.data.DenseMatrix64F U,
                                                   boolean transpose,
                                                   boolean compact,
                                                   int m,
                                                   int n,
                                                   int min)

getV

public org.ejml.data.DenseMatrix64F getV(org.ejml.data.DenseMatrix64F V,
                                         boolean transpose,
                                         boolean compact)

Returns the orthogonal V matrix.

Specified by:

getV in interface org.ejml.interfaces.decomposition.BidiagonalDecomposition<org.ejml.data.DenseMatrix64F>

Parameters:

V - If not null then the results will be stored here. Otherwise a new matrix will be created.

Returns:

The extracted Q matrix.

handleV

public static org.ejml.data.DenseMatrix64F handleV(org.ejml.data.DenseMatrix64F V,
                                                   boolean transpose,
                                                   boolean compact,
                                                   int m,
                                                   int n,
                                                   int min)

computeU

protected void computeU(int k)

computeV

protected void computeV(int k)

getGammasU

public double[] getGammasU()

Returns gammas from the householder operations for the U matrix.

Returns:

gammas for householder operations

getGammasV

public double[] getGammasV()

Returns gammas from the householder operations for the V matrix.

Returns:

gammas for householder operations

inputModified

public boolean inputModified()

Specified by:

inputModified in interface org.ejml.interfaces.decomposition.DecompositionInterface<org.ejml.data.DenseMatrix64F>