Package org.ejml.dense.row.decomposition.hessenberg

Class TridiagonalDecomposition_DDRB_to_DDRM

java.lang.Object

org.ejml.dense.row.decomposition.BaseDecomposition_DDRB_to_DDRM

org.ejml.dense.row.decomposition.hessenberg.TridiagonalDecomposition_DDRB_to_DDRM

All Implemented Interfaces:

DecompositionInterface<DMatrixRMaj>, TridiagonalSimilarDecomposition<DMatrixRMaj>, TridiagonalSimilarDecomposition_F64<DMatrixRMaj>

public class TridiagonalDecomposition_DDRB_to_DDRM
extends BaseDecomposition_DDRB_to_DDRM
implements TridiagonalSimilarDecomposition_F64<DMatrixRMaj>

Wrapper around a block implementation of TridiagonalSimilarDecomposition_F64

Field Summary

Fields inherited from class org.ejml.dense.row.decomposition.BaseDecomposition_DDRB_to_DDRM

Ablock, alg, blockLength, workspace

Constructor Summary

Constructors

Constructor	Description
TridiagonalDecomposition_DDRB_to_DDRM()
TridiagonalDecomposition_DDRB_to_DDRM(int blockSize)

Method Summary

Modifier and Type	Method	Description
void	getDiagonal(double[] diag, double[] off)	Extracts the diagonal and off diagonal elements of the decomposed tridiagonal matrix.
DMatrixRMaj	getQ(@Nullable DMatrixRMaj Q, boolean transposed)	An orthogonal matrix that has the following property: T = QHAQ
DMatrixRMaj	getT(@Nullable DMatrixRMaj T)	Extracts the tridiagonal matrix found in the decomposition.

Methods inherited from class org.ejml.dense.row.decomposition.BaseDecomposition_DDRB_to_DDRM

convertBlockToRow, decompose, inputModified

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.ejml.interfaces.decomposition.DecompositionInterface

decompose, inputModified

Constructor Details

TridiagonalDecomposition_DDRB_to_DDRM

public TridiagonalDecomposition_DDRB_to_DDRM()

TridiagonalDecomposition_DDRB_to_DDRM

public TridiagonalDecomposition_DDRB_to_DDRM(int blockSize)

Method Details

getT

public DMatrixRMaj getT(@Nullable
 @Nullable DMatrixRMaj T)

Description copied from interface: TridiagonalSimilarDecomposition

Extracts the tridiagonal matrix found in the decomposition.

Specified by:

getT in interface TridiagonalSimilarDecomposition<DMatrixRMaj>

Parameters:

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

Returns:

The extracted T matrix.

getQ

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

Description copied from interface: TridiagonalSimilarDecomposition

An orthogonal matrix that has the following property: T = Q^HAQ

Specified by:

getQ in interface TridiagonalSimilarDecomposition<DMatrixRMaj>

Parameters:

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

transposed - If true then the transpose (real) or conjugate transpose (complex) of Q is returned.

Returns:

The extracted Q matrix.

getDiagonal

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

Description copied from interface: TridiagonalSimilarDecomposition_F64

Extracts the diagonal and off diagonal elements of the decomposed tridiagonal matrix. Since it is symmetric only one off diagonal array is returned.

Specified by:

getDiagonal in interface TridiagonalSimilarDecomposition_F64<DMatrixRMaj>

Parameters:

diag - Diagonal elements. Modified.

off - off diagonal elements. Modified.