Package org.ejml.sparse.csc.misc

Class ImplCommonOps_DSCC

java.lang.Object

org.ejml.sparse.csc.misc.ImplCommonOps_DSCC

public class ImplCommonOps_DSCC
extends Object

Implementation class. Not recommended for direct use. Instead use CommonOps_DSCC instead.

Constructor Summary

Constructors

Constructor	Description
ImplCommonOps_DSCC()

Method Summary

Modifier and Type	Method	Description
static void	add(double alpha, DMatrixSparseCSC A, double beta, DMatrixSparseCSC B, DMatrixSparseCSC C, @Nullable IGrowArray gw, @Nullable DGrowArray gx)	Performs matrix addition: C = αA + βB
static void	addColAppend(double alpha, DMatrixSparseCSC A, int colA, double beta, DMatrixSparseCSC B, int colB, DMatrixSparseCSC C, @Nullable IGrowArray gw)	Adds the results of adding a column in A and B as a new column in C. C(:,end+1) = α*A(:,colA) + β*B(:,colB)
static void	duplicatesAdd(DMatrixSparseCSC A, @Nullable IGrowArray work)
static void	elementMult(DMatrixSparseCSC A, DMatrixSparseCSC B, DMatrixSparseCSC C, @Nullable IGrowArray gw, @Nullable DGrowArray gx)	Performs element-wise multiplication: C_ij = A_ij * B_ij
static void	removeZeros(DMatrixSparseCSC A, double tol)
static void	removeZeros(DMatrixSparseCSC input, DMatrixSparseCSC output, double tol)
static void	select(DMatrixSparseCSC A, DMatrixSparseCSC output, IPredicateBinary selector)
static void	symmLowerToFull(DMatrixSparseCSC A, DMatrixSparseCSC B, @Nullable IGrowArray gw)	Given a symmetric matrix which is represented by a lower triangular matrix convert it back into a full symmetric matrix
static void	transpose(DMatrixSparseCSC A, DMatrixSparseCSC C, @Nullable IGrowArray gw)	Performs a matrix transpose.

Methods inherited from class java.lang.Object

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

Constructor Details

ImplCommonOps_DSCC

public ImplCommonOps_DSCC()

Method Details

select

public static void select(DMatrixSparseCSC A,
 DMatrixSparseCSC output,
 IPredicateBinary selector)

transpose

public static void transpose(DMatrixSparseCSC A,
 DMatrixSparseCSC C,
 @Nullable
 @Nullable IGrowArray gw)

Performs a matrix transpose.

Parameters:

A - Original matrix. Not modified.

C - Storage for transposed 'A'. Reshaped.

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

add

public static void add(double alpha,
 DMatrixSparseCSC A,
 double beta,
 DMatrixSparseCSC B,
 DMatrixSparseCSC C,
 @Nullable
 @Nullable IGrowArray gw,
 @Nullable
 @Nullable DGrowArray gx)

Performs matrix addition:
C = αA + βB

Parameters:

alpha - scalar value multiplied against A

A - Matrix

beta - scalar value multiplied against B

B - Matrix

C - Output matrix.

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

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

addColAppend

public static void addColAppend(double alpha,
 DMatrixSparseCSC A,
 int colA,
 double beta,
 DMatrixSparseCSC B,
 int colB,
 DMatrixSparseCSC C,
 @Nullable
 @Nullable IGrowArray gw)

Adds the results of adding a column in A and B as a new column in C.
C(:,end+1) = α*A(:,colA) + β*B(:,colB)

Parameters:

alpha - scalar

A - matrix

colA - column in A

beta - scalar

B - matrix

colB - column in B

C - Column in C

gw - workspace

elementMult

public static void elementMult(DMatrixSparseCSC A,
 DMatrixSparseCSC B,
 DMatrixSparseCSC C,
 @Nullable
 @Nullable IGrowArray gw,
 @Nullable
 @Nullable DGrowArray gx)

Performs element-wise multiplication:
C_ij = A_ij * B_ij

Parameters:

A - (Input) Matrix

B - (Input) Matrix

C - (Output) Matrix.

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

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

removeZeros

public static void removeZeros(DMatrixSparseCSC input,
 DMatrixSparseCSC output,
 double tol)

removeZeros

public static void removeZeros(DMatrixSparseCSC A,
 double tol)

duplicatesAdd

public static void duplicatesAdd(DMatrixSparseCSC A,
 @Nullable
 @Nullable IGrowArray work)

symmLowerToFull

public static void symmLowerToFull(DMatrixSparseCSC A,
 DMatrixSparseCSC B,
 @Nullable
 @Nullable IGrowArray gw)

Given a symmetric matrix which is represented by a lower triangular matrix convert it back into a full symmetric matrix

Parameters:

A - (Input) Lower triangular matrix

B - (Output) Symmetric matrix.

gw - (Optional) Workspace. Can be null.