org.ejml.sparse.csc.mult

Class ImplSparseSparseMult_DSCC

java.lang.Object

org.ejml.sparse.csc.mult.ImplSparseSparseMult_DSCC

public class ImplSparseSparseMult_DSCC
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
ImplSparseSparseMult_DSCC()

Method Summary

Modifier and Type	Method and Description
static void	addRowsInAInToC(org.ejml.data.DMatrixSparseCSC A, int colA, org.ejml.data.DMatrixSparseCSC C, int colC, int[] w) Adds rows to C[*,colC] that are in A[*,colA] as long as they are marked in w.
static double	dotInnerColumns(org.ejml.data.DMatrixSparseCSC A, int colA, org.ejml.data.DMatrixSparseCSC B, int colB, org.ejml.data.IGrowArray gw, org.ejml.data.DGrowArray gx) Computes the inner product of two column vectors taken from the input matrices.
static void	mult(org.ejml.data.DMatrixSparseCSC A, org.ejml.data.DMatrixRMaj B, org.ejml.data.DMatrixRMaj C)
static void	mult(org.ejml.data.DMatrixSparseCSC A, org.ejml.data.DMatrixSparseCSC B, org.ejml.data.DMatrixSparseCSC C, org.ejml.data.IGrowArray gw, org.ejml.data.DGrowArray gx) Performs matrix multiplication.
static void	multAddColA(org.ejml.data.DMatrixSparseCSC A, int colA, double alpha, org.ejml.data.DMatrixSparseCSC C, int mark, double[] x, int[] w) Performs the performing operation x = x + A(:,i)*alpha
static void	multTransA(org.ejml.data.DMatrixSparseCSC A, org.ejml.data.DMatrixSparseCSC B, org.ejml.data.DMatrixSparseCSC C, org.ejml.data.IGrowArray gw, org.ejml.data.DGrowArray gx) Performs matrix multiplication.
static void	multTransB(org.ejml.data.DMatrixSparseCSC A, org.ejml.data.DMatrixSparseCSC B, org.ejml.data.DMatrixSparseCSC C, org.ejml.data.IGrowArray gw, org.ejml.data.DGrowArray gx) Performs matrix multiplication.

Methods inherited from class java.lang.Object

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

Constructor Detail

ImplSparseSparseMult_DSCC

public ImplSparseSparseMult_DSCC()

Method Detail

mult

public static void mult(org.ejml.data.DMatrixSparseCSC A,
                        org.ejml.data.DMatrixSparseCSC B,
                        org.ejml.data.DMatrixSparseCSC C,
                        org.ejml.data.IGrowArray gw,
                        org.ejml.data.DGrowArray gx)

Performs matrix multiplication. C = A*B

Parameters:

A - Matrix

B - Matrix

C - Storage for results. Data length is increased if increased if insufficient.

gw - (Optional) Storage for internal workspace. Can be null.

gx - (Optional) Storage for internal workspace. Can be null.

multTransA

public static void multTransA(org.ejml.data.DMatrixSparseCSC A,
                              org.ejml.data.DMatrixSparseCSC B,
                              org.ejml.data.DMatrixSparseCSC C,
                              org.ejml.data.IGrowArray gw,
                              org.ejml.data.DGrowArray gx)

Performs matrix multiplication. C = A^T*B

Parameters:

A - Matrix

B - Matrix

C - Storage for results. Data length is increased if increased if insufficient.

gw - (Optional) Storage for internal workspace. Can be null.

gx - (Optional) Storage for internal workspace. Can be null.

multTransB

public static void multTransB(org.ejml.data.DMatrixSparseCSC A,
                              org.ejml.data.DMatrixSparseCSC B,
                              org.ejml.data.DMatrixSparseCSC C,
                              org.ejml.data.IGrowArray gw,
                              org.ejml.data.DGrowArray gx)

Performs matrix multiplication. C = A*B^T

Parameters:

A - Matrix

B - Matrix

C - Storage for results. Data length is increased if increased if insufficient.

gw - (Optional) Storage for internal workspace. Can be null.

gx - (Optional) Storage for internal workspace. Can be null.

multAddColA

public static void multAddColA(org.ejml.data.DMatrixSparseCSC A,
                               int colA,
                               double alpha,
                               org.ejml.data.DMatrixSparseCSC C,
                               int mark,
                               double[] x,
                               int[] w)

Performs the performing operation x = x + A(:,i)*alpha

NOTE: This is the same as cs_scatter() in csparse.

addRowsInAInToC

public static void addRowsInAInToC(org.ejml.data.DMatrixSparseCSC A,
                                   int colA,
                                   org.ejml.data.DMatrixSparseCSC C,
                                   int colC,
                                   int[] w)

Adds rows to C[*,colC] that are in A[*,colA] as long as they are marked in w. This is used to grow C and colC must be the last filled in column in C.

NOTE: This is the same as cs_scatter if x is null.

Parameters:

A - Matrix

colA - The column in A that is being examined

C - Matrix

colC - Column in C that rows in A are being added to.

w - An array used to indicate if a row in A should be added to C. if w[i] < colC AND i is a row in A[*,colA] then it will be added.

mult

public static void mult(org.ejml.data.DMatrixSparseCSC A,
                        org.ejml.data.DMatrixRMaj B,
                        org.ejml.data.DMatrixRMaj C)

dotInnerColumns

public static double dotInnerColumns(org.ejml.data.DMatrixSparseCSC A,
                                     int colA,
                                     org.ejml.data.DMatrixSparseCSC B,
                                     int colB,
                                     org.ejml.data.IGrowArray gw,
                                     org.ejml.data.DGrowArray gx)

Computes the inner product of two column vectors taken from the input matrices.

dot = A(:,colA)'*B(:,colB)

Parameters:

A - Matrix

colA - Column in A

B - Matrix

colB - Column in B

Returns:

Dot product