Package org.ejml.dense.row.decomposition.qr

Class QRDecompositionHouseholderColumn_MT_DDRM

java.lang.Object

org.ejml.dense.row.decomposition.qr.QRDecompositionHouseholderColumn_DDRM

org.ejml.dense.row.decomposition.qr.QRDecompositionHouseholderColumn_MT_DDRM

All Implemented Interfaces:

DecompositionInterface<DMatrixRMaj>, QRDecomposition<DMatrixRMaj>

public class QRDecompositionHouseholderColumn_MT_DDRM
extends QRDecompositionHouseholderColumn_DDRM

Concurrent extension of QRDecompositionHouseholderColumn_DDRM.

Field Summary

Fields inherited from class org.ejml.dense.row.decomposition.qr.QRDecompositionHouseholderColumn_DDRM

dataQR, error, gamma, gammas, minLength, numCols, numRows, tau, v

Constructor Summary

Constructors

Constructor	Description
QRDecompositionHouseholderColumn_MT_DDRM()

Method Summary

Modifier and Type	Method	Description
DMatrixRMaj	getQ(@Nullable DMatrixRMaj Q, boolean compact)	Computes the Q matrix from the imformation stored in the QR matrix.
protected void	updateA(int w)	Takes the results from the householder computation and updates the 'A' matrix. A = (I - γ*u*uT)A

Methods inherited from class org.ejml.dense.row.decomposition.qr.QRDecompositionHouseholderColumn_DDRM

convertToColumnMajor, decompose, getGammas, getQR, getR, householder, inputModified, setExpectedMaxSize

Methods inherited from class java.lang.Object

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

Constructor Details

QRDecompositionHouseholderColumn_MT_DDRM

public QRDecompositionHouseholderColumn_MT_DDRM()

Method Details

getQ

public DMatrixRMaj getQ(@Nullable
 @Nullable DMatrixRMaj Q,
 boolean compact)

Description copied from class: QRDecompositionHouseholderColumn_DDRM

Computes the Q matrix from the imformation stored in the QR matrix. This operation requires about 4(m²n-mn²+n³/3) flops.

Specified by:

getQ in interface QRDecomposition<DMatrixRMaj>

Overrides:

getQ in class QRDecompositionHouseholderColumn_DDRM

Parameters:

Q - The orthogonal Q matrix.

compact - If true an m by n matrix is created, otherwise n by n.

Returns:

The Q matrix.

updateA

protected void updateA(int w)

Description copied from class: QRDecompositionHouseholderColumn_DDRM

Takes the results from the householder computation and updates the 'A' matrix.

A = (I - γ*u*u^T)A

Overrides:

updateA in class QRDecompositionHouseholderColumn_DDRM

Parameters:

w - The submatrix.