org.ejml.alg.dense.decomposition.hessenberg

Class TridiagonalDecomposition_B64_to_D64

java.lang.Object

org.ejml.alg.dense.decomposition.BaseDecomposition_B64_to_D64

org.ejml.alg.dense.decomposition.hessenberg.TridiagonalDecomposition_B64_to_D64

All Implemented Interfaces:

DecompositionInterface<DenseMatrix64F>, TridiagonalSimilarDecomposition<DenseMatrix64F>

public class TridiagonalDecomposition_B64_to_D64
extends BaseDecomposition_B64_to_D64
implements TridiagonalSimilarDecomposition<DenseMatrix64F>

Wrapper around a block implementation of TridiagonalSimilarDecomposition

Constructor Summary

Constructors

Constructor and Description
TridiagonalDecomposition_B64_to_D64()
TridiagonalDecomposition_B64_to_D64(int blockSize)

Method Summary

Modifier and Type	Method and Description
void	getDiagonal(double[] diag, double[] off) Extracts the diagonal and off diagonal elements of the decomposed tridiagonal matrix.
DenseMatrix64F	getQ(DenseMatrix64F Q, boolean transposed) An orthogonal matrix that has the following property: T = QTAQ
DenseMatrix64F	getT(DenseMatrix64F T) Extracts the tridiagonal matrix found in the decomposition.

Methods inherited from class org.ejml.alg.dense.decomposition.BaseDecomposition_B64_to_D64

convertBlockToRow, decompose, inputModified

Methods inherited from class java.lang.Object

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

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

decompose, inputModified

Constructor Detail

TridiagonalDecomposition_B64_to_D64

public TridiagonalDecomposition_B64_to_D64()

TridiagonalDecomposition_B64_to_D64

public TridiagonalDecomposition_B64_to_D64(int blockSize)

Method Detail

getT

public DenseMatrix64F getT(DenseMatrix64F T)

Description copied from interface: TridiagonalSimilarDecomposition

Extracts the tridiagonal matrix found in the decomposition.

Specified by:

getT in interface TridiagonalSimilarDecomposition<DenseMatrix64F>

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 DenseMatrix64F getQ(DenseMatrix64F Q,
                           boolean transposed)

Description copied from interface: TridiagonalSimilarDecomposition

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

Specified by:

getQ in interface TridiagonalSimilarDecomposition<DenseMatrix64F>

Parameters:

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

Returns:

The extracted Q matrix.

getDiagonal

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

Description copied from interface: TridiagonalSimilarDecomposition

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<DenseMatrix64F>

Parameters:

diag - Diagonal elements. Modified.

off - off diagonal elements. Modified.