cCSRMatrix< DataType > Class Template Reference

#include <c_csr_matrix.h>

Inheritance diagram for cCSRMatrix< DataType >:

Collaboration diagram for cCSRMatrix< DataType >:

Public Member Functions
	cCSRMatrix ()
	cCSRMatrix (const DataType *A_data_, const LongIndexType *A_indices_, const LongIndexType *A_index_pointer_, const LongIndexType num_rows_, const LongIndexType num_columns_)
virtual	~cCSRMatrix ()
virtual FlagType	is_identity_matrix () const
	Checks whether the matrix is identity. More...
LongIndexType	get_nnz () const
	Returns the number of non-zero elements of the sparse matrix. More...
virtual void	dot (const DataType *vector, DataType *product)
virtual void	dot_plus (const DataType *vector, const DataType alpha, DataType *product)
virtual void	transpose_dot (const DataType *vector, DataType *product)
virtual void	transpose_dot_plus (const DataType *vector, const DataType alpha, DataType *product)
Public Member Functions inherited from cMatrix< DataType >
	cMatrix ()
	Default constructor. More...
virtual	~cMatrix ()
DataType	get_eigenvalue (const DataType *known_parameters, const DataType known_eigenvalue, const DataType *inquiry_parameters) const
	This virtual function is implemented from its pure virtual function of the base class. In this class, this functio has no use and was only implemented so that this class be able to be instantiated (due to the pure virtual function). More...
Public Member Functions inherited from cLinearOperator< DataType >
	cLinearOperator ()
	Default constructor. More...
	cLinearOperator (const LongIndexType num_rows_, const LongIndexType num_columns_)
	Constructor with setting num_rows and num_columns. More...
virtual	~cLinearOperator ()
LongIndexType	get_num_rows () const
LongIndexType	get_num_columns () const
void	set_parameters (DataType *parameters_)
	Sets the scalar parameter this->parameters. Parameter is initialized to NULL. However, before calling dot or transpose_dot functions, the parameters must be set. More...
IndexType	get_num_parameters () const
FlagType	is_eigenvalue_relation_known () const
	Returns a flag that determines whether a relation between the parameters of the operator and its eigenvalue(s) is known. More...

Protected Attributes
const DataType *	A_data
const LongIndexType *	A_indices
const LongIndexType *	A_index_pointer
Protected Attributes inherited from cLinearOperator< DataType >
const LongIndexType	num_rows
const LongIndexType	num_columns
FlagType	eigenvalue_relation_known
DataType *	parameters
IndexType	num_parameters

Detailed Description

template<typename DataType>
class cCSRMatrix< DataType >

Definition at line 29 of file c_csr_matrix.h.

Constructor & Destructor Documentation

cCSRMatrix() [1/2]

template<typename DataType >

cCSRMatrix< DataType >::cCSRMatrix

Definition at line 26 of file c_csr_matrix.cpp.

                                :
    A_data(NULL),
    A_indices(NULL),
    A_index_pointer(NULL)
{
}

cCSRMatrix() [2/2]

template<typename DataType >

cCSRMatrix< DataType >::cCSRMatrix	(	const DataType *	A_data_,
		const LongIndexType *	A_indices_,
		const LongIndexType *	A_index_pointer_,
		const LongIndexType	num_rows_,
		const LongIndexType	num_columns_
	)

Definition at line 39 of file c_csr_matrix.cpp.

                                         :
 
    // Base class constructor
    cLinearOperator<DataType>(num_rows_, num_columns_),
 
    // Initializer list
    A_data(A_data_),
    A_indices(A_indices_),
    A_index_pointer(A_index_pointer_)
{
}

~cCSRMatrix()

template<typename DataType >

cCSRMatrix< DataType >::~cCSRMatrix

virtual

Definition at line 62 of file c_csr_matrix.cpp.

{
}

Member Function Documentation

dot()

template<typename DataType >

void cCSRMatrix< DataType >::dot ( const DataType *  vector, DataType *  product  )

virtual

Implements cLinearOperator< DataType >.

Reimplemented in cuCSRMatrix< DataType >.

Definition at line 138 of file c_csr_matrix.cpp.

{
    cMatrixOperations<DataType>::csr_matvec(
            this->A_data,
            this->A_indices,
            this->A_index_pointer,
            vector,
            this->num_rows,
            product);
}

References cMatrixOperations< DataType >::csr_matvec().

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dot_plus()

template<typename DataType >

void cCSRMatrix< DataType >::dot_plus ( const DataType *  vector, const DataType  alpha, DataType *  product  )

virtual

Implements cMatrix< DataType >.

Reimplemented in cuCSRMatrix< DataType >.

Definition at line 157 of file c_csr_matrix.cpp.

{
    cMatrixOperations<DataType>::csr_matvec_plus(
            this->A_data,
            this->A_indices,
            this->A_index_pointer,
            vector,
            alpha,
            this->num_rows,
            product);
}

References cMatrixOperations< DataType >::csr_matvec_plus().

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get_nnz()

template<typename DataType >

LongIndexType cCSRMatrix< DataType >::get_nnz

Returns the number of non-zero elements of the sparse matrix.

The nnz of a CSR matrix can be obtained from the last element of A_index_pointer. The size of array A_index_pointer is one plus the number of rows of the matrix.

Returns

The nnz of the matrix.

Definition at line 127 of file c_csr_matrix.cpp.

{
    return this->A_index_pointer[this->num_rows];
}

is_identity_matrix()

template<typename DataType >

FlagType cCSRMatrix< DataType >::is_identity_matrix

virtual

Checks whether the matrix is identity.

The identity check is primarily performed in the cAffineMatrixFunction class.

Returns

Returns 1 if the input matrix is identity, and 0 otherwise.

See also

cAffineMatrixFunction

Implements cMatrix< DataType >.

Definition at line 81 of file c_csr_matrix.cpp.

{
    FlagType matrix_is_identity = 1;
    LongIndexType index_pointer;
    LongIndexType column;
 
    // Check matrix element-wise
    for (LongIndexType row=0; row < this->num_rows; ++row)
    {
        for (index_pointer=this->A_index_pointer[row];
             index_pointer < this->A_index_pointer[row+1];
             ++index_pointer)
        {
            column = this->A_indices[index_pointer];
 
            if ((row == column) && \
               (this->A_data[index_pointer] != 1.0))
            {
                matrix_is_identity = 0;
                return matrix_is_identity;
            }
            else if (this->A_data[index_pointer] != 0.0)
            {
                matrix_is_identity = 0;
                return matrix_is_identity;
            }
        }
    }
 
    return matrix_is_identity;
}

transpose_dot()

template<typename DataType >

void cCSRMatrix< DataType >::transpose_dot ( const DataType *  vector, DataType *  product  )

virtual

Implements cLinearOperator< DataType >.

Reimplemented in cuCSRMatrix< DataType >.

Definition at line 178 of file c_csr_matrix.cpp.

{
    cMatrixOperations<DataType>::csr_transposed_matvec(
            this->A_data,
            this->A_indices,
            this->A_index_pointer,
            vector,
            this->num_rows,
            this->num_columns,
            product);
}

References cMatrixOperations< DataType >::csr_transposed_matvec().

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transpose_dot_plus()

template<typename DataType >

void cCSRMatrix< DataType >::transpose_dot_plus ( const DataType *  vector, const DataType  alpha, DataType *  product  )

virtual

Implements cMatrix< DataType >.

Reimplemented in cuCSRMatrix< DataType >.

Definition at line 198 of file c_csr_matrix.cpp.

{
    cMatrixOperations<DataType>::csr_transposed_matvec_plus(
            this->A_data,
            this->A_indices,
            this->A_index_pointer,
            vector,
            alpha,
            this->num_rows,
            product);
}

References cMatrixOperations< DataType >::csr_transposed_matvec_plus().

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Member Data Documentation

A_data

template<typename DataType >

const DataType* cCSRMatrix< DataType >::A_data

protected

Definition at line 70 of file c_csr_matrix.h.

A_index_pointer

template<typename DataType >

const LongIndexType* cCSRMatrix< DataType >::A_index_pointer

protected

Definition at line 72 of file c_csr_matrix.h.

A_indices

template<typename DataType >

const LongIndexType* cCSRMatrix< DataType >::A_indices

protected

Definition at line 71 of file c_csr_matrix.h.

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The documentation for this class was generated from the following files:

• /home/runner/work/imate/imate/imate/_c_linear_operator/c_csr_matrix.h
• /home/runner/work/imate/imate/imate/_c_linear_operator/c_csr_matrix.cpp