Package org.ejml.dense.row.decomposition.chol

Class CholeskyDecompositionBlock_MT_DDRM

java.lang.Object

org.ejml.dense.row.decomposition.chol.CholeskyDecompositionCommon_DDRM

org.ejml.dense.row.decomposition.chol.CholeskyDecompositionBlock_DDRM

org.ejml.dense.row.decomposition.chol.CholeskyDecompositionBlock_MT_DDRM

All Implemented Interfaces:

CholeskyDecomposition<DMatrixRMaj>, CholeskyDecomposition_F64<DMatrixRMaj>, DecompositionInterface<DMatrixRMaj>

public class CholeskyDecompositionBlock_MT_DDRM
extends CholeskyDecompositionBlock_DDRM

Field Summary

Fields inherited from class org.ejml.dense.row.decomposition.chol.CholeskyDecompositionCommon_DDRM

det, lower, maxWidth, n, t, T, vv

Constructor Summary

Constructors

Constructor	Description
CholeskyDecompositionBlock_MT_DDRM(int blockWidth)	Creates a CholeksyDecomposition capable of decomposing a matrix that is n by n, where n is the width.

Method Summary

Modifier and Type	Method	Description
void	solveL_special(double[] L, DMatrixRMaj b_src, int indexSrc, int indexDst, DMatrixRMaj B)	This is a variation on the TriangularSolver_DDRM.solveL(double[], double[], int) function.
void	symmRankTranA_sub(DMatrixRMaj a, DMatrixRMaj c, int startIndexC)	Performs this operation: c = c - aTa where c is a submatrix.

Methods inherited from class org.ejml.dense.row.decomposition.chol.CholeskyDecompositionBlock_DDRM

decomposeLower, decomposeUpper, setExpectedMaxSize

Methods inherited from class org.ejml.dense.row.decomposition.chol.CholeskyDecompositionCommon_DDRM

_getVV, computeDeterminant, decompose, getT, getT, inputModified, isLower

Methods inherited from class java.lang.Object

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

Constructor Details

CholeskyDecompositionBlock_MT_DDRM

public CholeskyDecompositionBlock_MT_DDRM(int blockWidth)

Creates a CholeksyDecomposition capable of decomposing a matrix that is n by n, where n is the width.

Parameters:

blockWidth - The width of a block.

Method Details

solveL_special

public void solveL_special(double[] L,
 DMatrixRMaj b_src,
 int indexSrc,
 int indexDst,
 DMatrixRMaj B)

Description copied from class: CholeskyDecompositionBlock_DDRM

This is a variation on the TriangularSolver_DDRM.solveL(double[], double[], int) function. It grabs the input from the top right row rectangle of the source matrix then writes the results to the lower bottom column rectangle. The rectangle matrices just matrices are submatrices of the matrix that is being decomposed. The results are also written to B.

Overrides:

solveL_special in class CholeskyDecompositionBlock_DDRM

Parameters:

L - A lower triangular matrix.

b_src - matrix with the vectors that are to be solved for

indexSrc - First index of the submatrix where the inputs are coming from.

indexDst - First index of the submatrix where the results are going to.

symmRankTranA_sub

public void symmRankTranA_sub(DMatrixRMaj a,
 DMatrixRMaj c,
 int startIndexC)

Description copied from class: CholeskyDecompositionBlock_DDRM

Performs this operation:

c = c - a^Ta
where c is a submatrix.

Only the upper triangle is updated.

Overrides:

symmRankTranA_sub in class CholeskyDecompositionBlock_DDRM

Parameters:

a - A matrix.

c - A matrix.

startIndexC - start of the submatrix in c.