📁 CSRMatrix

📄️ AMatVec

This routine performs matrix vector multiplication for csrmatrix.

📄️ Allocate

This subroutine creates memory space for the sparse matrix.

📄️ AtMatVec

This routine performs transpose matrix vector multiplication for csrmatrix ($A^T\ cdot x$).

📄️ Structure

CSRMatrix data type defines a sparse matrix in the CSR format. EASIFEM uses Sparsekit library for handling CSRMatrix.

📄️ Clean

This routine performs tasks related to the cleaning of sparse matrix.

📄️ ColumnSort

This routine sorts the elements of a matrix (stored in Compressed Sparse Row Format) in increasing order of their column indices within each row. It uses insertion sort algorithm.

📄️ Convert

Convert() is a generic method, which can be used to change the format of matrix.

📄️ Deallocate

To Deallocate the data stored inside an instance of CSRMatrix_ use Deallocate() method.

📄️ DiagonalScaling

DiagonalScaling performs diagonal scaling on CSRMatrix.

📄️ Display

Display method displays the contents of CSRMatrix_ object.

📄️ DropEntry

This routine removes any element whose absolute value is small from an input matrix A and puts the resulting matrix in B.

📄️ Get

This function returns a single value from the sparse MATRIX.

📄️ GetBlockRow

This routine returns a row of a block csrmatrix.

📄️ GetColumn

This routine returns the column of a csrmatrix.

📄️ GetDiagonal

This routine returns the diagonal entries of sparse MATRIX.

📄️ GetILUD

This routine computes the ILU factorization with standard threshold dropping

📄️ GetILUDP

This routine computes ILUDP preconditioner: incomplete LU factorization with standard droppoing strategy.

📄️ GetILUK

This routine returns the ILU WITH LEVEL OF FILL-IN OF K (ILU(k))

📄️ GetILUT

This routine builds the ILUT precondition.

📄️ GetILUTP

Incomplete LU factorization with dual truncation mechanism

📄️ GetLowerTriangle

This subroutine returns the lower part of the sparse matrix.

📄️ GetNNZ

Returns the number of non-zero entries in csrmatrix.

📄️ GetRow

This routine returns a row of CSR matrix.

📄️ GetSym

Returns the symmetric form of a sparse matrix.

📄️ GetTranspose

In-place transposition routine. This subroutine transposes a matrix stored in compressed sparse row format.

📄️ GetUpperTriangle

This subroutine returns the Upper part of the sparse matrix.

📄️ Harwell-Boeing

The Harwell-Boeing format is the most popular mechanism for text-file exchange of sparse matrix data.

📄️ Import

Import() can be used for importing sparse matrix data from a file.

📄️ Initiate

Initiate() method constructs an instance of CSRMatrix_.

📄️ LUSolve

This routine solves the system LU x = y, given an LU decomposition of a matrix stored in (ALU, JLU, JU) modified sparse row format (MSR).

This routine solves the system (LU)^T x = y, given an LU decomposition of a matrix stored in (ALU, JLU, JU) modified sparse row format (MSR). This ALU, JLU, JU are created by calling ILUT methods described above