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Sparse Types#

#include <raft/core/sparse_types.hpp>

enum SparsityType#

Values:

enumerator OWNING#
enumerator PRESERVING#
using row_type = RowType#
using col_type = ColType#
using nnz_type = NZType#
using element_type = ElementType
using structure_view_type = typename StructureType::view_type#
using view_type = ViewType#
using element_type = typename view_type::element_type
using structure_type = StructureType#
using row_type = typename structure_type::row_type
using col_type = typename structure_type::col_type
using nnz_type = typename structure_type::nnz_type
using structure_view_type = typename structure_type::view_type
using container_policy_type = ContainerPolicy<element_type>#
using container_type = typename container_policy_type::container_type#
inline sparse_structure(row_type n_rows, col_type n_cols, nnz_type nnz)#

Constructor when sparsity is already known

Parameters:

  • n_rows – total number of rows in matrix

  • n_cols – total number of columns in matrix

  • nnz – sparsity of matrix

inline sparse_structure(row_type n_rows, col_type n_cols)#

Constructor when sparsity is not yet known

Parameters:

  • n_rows – total number of rows in matrix

  • n_cols – total number of columns in matrix

inline nnz_type get_nnz()#

Return the sparsity of the matrix (this will be 0 when sparsity is not yet known)

Returns:

sparsity of matrix

inline row_type get_n_rows()#

Return the total number of rows in the matrix

Returns:

total number of rows in the matriz

inline col_type get_n_cols()#

Return the total number of columns in the matrix

Returns:

total number of columns

inline virtual void initialize_sparsity(nnz_type nnz)#

Initialize the matrix sparsity when it was not known upon construction.

Parameters:

nnz –

inline sparse_matrix_view(raft::span<ElementType, is_device> element_span, structure_view_type structure_view)#
inline structure_view_type structure_view()#

Return a view of the structure underlying this matrix

Returns:

inline span<element_type, is_device> get_elements()#

Return a span of the nonzero elements of the matrix

Returns:

span of the nonzero elements of the matrix

inline sparse_matrix(raft::resources const &handle, row_type n_rows, col_type n_cols, nnz_type nnz = 0) noexcept(std::is_nothrow_default_constructible_v<container_type>)#
inline sparse_matrix(raft::resources const &handle, structure_type structure) noexcept(std::is_nothrow_default_constructible_v<container_type>)#
constexpr sparse_matrix(sparse_matrix const&) noexcept(std::is_nothrow_copy_constructible_v<container_type>) = default#
constexpr sparse_matrix(sparse_matrix&&) noexcept(std::is_nothrow_move_constructible<container_type>::value) = default#
constexpr auto operator=(sparse_matrix const&) noexcept(std::is_nothrow_copy_assignable<container_type>::value) -> sparse_matrix& = default#
constexpr auto operator=(sparse_matrix&&) noexcept(std::is_nothrow_move_assignable<container_type>::value) -> sparse_matrix& = default#
~sparse_matrix() noexcept(std::is_nothrow_destructible<container_type>::value) = default#
inline void initialize_sparsity(nnz_type nnz)
inline raft::span<ElementType, is_device> get_elements()
virtual structure_view_type structure_view() = 0

Return a view of the structure underlying this matrix

Returns:

inline view_type view()#

Return a sparsity-preserving view of this sparse matrix

Returns:

view of this sparse matrix

template<typename RowType, typename ColType, typename NZType, int is_device>
class sparse_structure#
#include <sparse_types.hpp>

Maintains metadata about the structure and sparsity of a sparse matrix.

Template Parameters:

  • RowType –

  • ColType –

  • NZType –

  • is_device –

Subclassed by raft::coordinate_structure_t< RowType, ColType, NZType, is_device >

template<typename ElementType, typename StructureType, bool is_device>
class sparse_matrix_view#
#include <sparse_types.hpp>

A non-owning view of a sparse matrix, which includes a structure component coupled with its elements/weights

Template Parameters:

  • ElementType –

  • sparse_structure –

template<typename ElementType, typename StructureType, typename ViewType, bool is_device, template<typename T> typename ContainerPolicy>
class sparse_matrix#
#include <sparse_types.hpp>

TODO: Need to support the following types of configurations:

  1. solid: immutable_sparse_matrix_view<const ElementType, const StructureType>

    • This is an immutable view type, nothing can change.

  2. liquid: sparse_matrix<ElementType, const StructureType>

    • sparse_matrix owning container w/ StructureType=immutable view?

  3. gas: sparse_matrix<ElementType, StructureType>

    • sparse_matrix owning container w/ StructureType owning container? An owning container for a sparse matrix, which includes a structure component coupled with its elements/weights

Template Parameters:

  • ElementType –

  • sparse_structure –

  • ContainerPolicy –

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