org.ejml.dense.block

Class InnerRankUpdate_DDRB

java.lang.Object

org.ejml.dense.block.InnerRankUpdate_DDRB

public class InnerRankUpdate_DDRB
extends java.lang.Object

Performs rank-n update operations on the inner blocks of a DMatrixRBlock It is assumed and not checked that the submatrices are aligned along the matrix's blocks.

Constructor Summary

Constructors

Constructor and Description
InnerRankUpdate_DDRB()

Method Summary

Modifier and Type	Method and Description
protected static void	multTransABlockMinus_U(double[] dataA, double[] dataC, int indexA, int indexB, int indexC, int heightA, int widthA, int widthC) Performs the following operation on the upper triangular portion of a block: c = c - aTa
protected static void	multTransABlockMinus(double[] dataA, double[] dataC, int indexA, int indexB, int indexC, int heightA, int widthA, int widthC) Performs the following operation on a block: c = c - aTa
protected static void	multTransBBlockMinus_L(double[] dataA, double[] dataC, int indexA, int indexB, int indexC, int widthA, int heightA, int widthC) Performs the following operation on the lower triangular portion of a block: c = c - a*aT
protected static void	multTransBBlockMinus(double[] dataA, double[] dataC, int indexA, int indexB, int indexC, int widthA, int heightA, int widthC) Performs the following operation on a block: c = c - a*aT
static void	rankNUpdate(int blockLength, double alpha, org.ejml.data.DSubmatrixD1 A, org.ejml.data.DSubmatrixD1 B) Performs: A = A + α B TB
static void	symmRankNMinus_L(int blockLength, org.ejml.data.DSubmatrixD1 A, org.ejml.data.DSubmatrixD1 B) Rank N update function for a symmetric inner submatrix and only operates on the lower triangular portion of the submatrix. A = A - B*BT
static void	symmRankNMinus_U(int blockLength, org.ejml.data.DSubmatrixD1 A, org.ejml.data.DSubmatrixD1 B) Rank N update function for a symmetric inner submatrix and only operates on the upper triangular portion of the submatrix. A = A - B TB

Methods inherited from class java.lang.Object

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

Constructor Detail

InnerRankUpdate_DDRB

public InnerRankUpdate_DDRB()

Method Detail

rankNUpdate

public static void rankNUpdate(int blockLength,
                               double alpha,
                               org.ejml.data.DSubmatrixD1 A,
                               org.ejml.data.DSubmatrixD1 B)

Performs:

A = A + α B ^TB

Parameters:

blockLength - Size of the block in the block matrix.

alpha - scaling factor for right hand side.

A - Block aligned submatrix.

B - Block aligned submatrix.

symmRankNMinus_U

public static void symmRankNMinus_U(int blockLength,
                                    org.ejml.data.DSubmatrixD1 A,
                                    org.ejml.data.DSubmatrixD1 B)

Rank N update function for a symmetric inner submatrix and only operates on the upper triangular portion of the submatrix.

A = A - B ^TB

symmRankNMinus_L

public static void symmRankNMinus_L(int blockLength,
                                    org.ejml.data.DSubmatrixD1 A,
                                    org.ejml.data.DSubmatrixD1 B)

Rank N update function for a symmetric inner submatrix and only operates on the lower triangular portion of the submatrix.

A = A - B*B^T

multTransABlockMinus

protected static void multTransABlockMinus(double[] dataA,
                                           double[] dataC,
                                           int indexA,
                                           int indexB,
                                           int indexC,
                                           int heightA,
                                           int widthA,
                                           int widthC)

Performs the following operation on a block:

c = c - a^Ta

multTransABlockMinus_U

protected static void multTransABlockMinus_U(double[] dataA,
                                             double[] dataC,
                                             int indexA,
                                             int indexB,
                                             int indexC,
                                             int heightA,
                                             int widthA,
                                             int widthC)

Performs the following operation on the upper triangular portion of a block:

c = c - a^Ta

multTransBBlockMinus

protected static void multTransBBlockMinus(double[] dataA,
                                           double[] dataC,
                                           int indexA,
                                           int indexB,
                                           int indexC,
                                           int widthA,
                                           int heightA,
                                           int widthC)

Performs the following operation on a block:

c = c - a*a^T

multTransBBlockMinus_L

protected static void multTransBBlockMinus_L(double[] dataA,
                                             double[] dataC,
                                             int indexA,
                                             int indexB,
                                             int indexC,
                                             int widthA,
                                             int heightA,
                                             int widthC)

Performs the following operation on the lower triangular portion of a block:

c = c - a*a^T