📁 CSRSparsity

📄️ CSRSparsityPointer

📄️ Structure

CSRSparsity is data type for handling CSRMatrix in EASIFEM.

📄️ CSRSparsity constructor

EASIFEM also has CSRSparsity and CSRSparsityPointer functions. They can be used to create an instance of [[CSRSparsity]]. The later returns the pointer to the newly created instance of [[CSRSparsity]] object. The usage are given below.

📄️ CSRSparsity example 1

This example shows how to create an instance of [[CSRSparsity_]]. Following methods are tested:

📄️ CSRSparsity example 2

This example shows how to create an instance of [[CSRSparsity_]] for block matrix storage. Following methods are tested:

📄️ CSRSparsity example 3

This example shows how to set sparsity pattern in an instance of [[CSRSparsity]]. The storage pattern is FMTDOF, and matrix is block matrix. Following methods are tested.

📄️ CSRSparsity example 4

This example shows how to set sparsity pattern in an instance of [[CSRSparsity]]. The storage pattern is FMTNODES, and matrix is not a block matrix.

📄️ CSRSparsity example 5

This example shows how to set sparsity pattern in an instance of [[CSRSparsity]]. The storage pattern is FMTDOF, and matrix is not a block matrix.

📄️ CSRSparsity example 6

This example shows how to set sparsity pattern by using IA and JA.

📄️ CSRSparsity example 7

This example shows how to set sparsity pattern by using a graph matrix. A graph matrix is a two-d array of 1 and 0. if graph( i, j ) is 1 then row-i and row-j are connected.

📄️ CSRSparsity example 8

This example shows how to set sparsity pattern by using a graph matrix. A graph matrix is a two-d array of true and false. if graph( i, j ) is true then row-i and row-j are connected.

📄️ CSRSparsity example 9

This example shows how to create an instance of [[CSRSparsity_]] for block matrix storage. Following methods are tested:

📄️ Deallocate

You can destruct an instance of [[CSRSparsity_]] by calling #CSRSparsity/Deallocate method as shown below.

📄️ Display

This method prints the contents of CSRSparsity_ object on the screen or to the file.

📄️ GetDiagonal

This subroutine returns the diagonal entries of sparse matrix.

📄️ GetNNZ

This function returns the number of non zeros.

📄️ GetSym

Make sparse matrix symmetric.

📄️ Initiate

Interface

📄️ SetSparsity

This subroutine sets the sparsity pattern in the CSRSparsity object.

📄️ Shape

This function Returns the shape of the array.

📄️ Size

This function returns the size of the sparse matrix.