mkl_sparse_?_create

Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

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ID 766686

Date 4/28/2026

Version

Public

mkl_sparse_?_create_coo

Creates a handle for a matrix in COO format.

Syntax

stat = mkl_sparse_s_create_coo ( A, indexing, rows, cols, nnz, row_indx, col_indx, values)

stat = mkl_sparse_d_create_coo ( A, indexing, rows, cols, nnz, row_indx, col_indx, values)

stat = mkl_sparse_c_create_coo ( A, indexing, rows, cols, nnz, row_indx, col_indx, values)

stat = mkl_sparse_z_create_coo ( A, indexing, rows, cols, nnz, row_indx, col_indx, values)

Include Files

mkl_spblas.f90

Description

The mkl_sparse_?_create_coo routine creates a handle for an m -by- k matrix A in the Coordinate (COO) format and fills it with user provided data arrays.

NOTE:

The input arrays provided are left unchanged except for the call to mkl_sparse_order , which performs ordering of column indexes of the matrix. To avoid any changes to the input data, use mkl_sparse_copy .

Input Parameters

indexing

sparse_index_base_t .

Indicates how input arrays are indexed:

`SPARSE_INDEX_BASE_ZERO`	Zero-based (C-style) indexing: indices start at 0.
`SPARSE_INDEX_BASE_ONE`	One-based (Fortran-style) indexing: indices start at 1.

rows

C_INT .

Number of rows of matrix A .

cols

C_INT .

Number of columns of matrix A .

nnz

C_INT .

Specifies the number of stored elements (sometimes called the non-zero elements, but they can be explicit zeros) of the matrix \(A\) . Refer to nnz description in Coordinate Format for more details.

row_indx

C_INT .

Array of length nnz, containing the row indices for each stored element of matrix \(A\) . Refer to rows array description in Coordinate Format for more details.

col_indx

C_INT .

Array of length nnz , containing the column indices for each non-zero element of matrix \(A\) . Refer to columns array description in Coordinate Format for more details.

values

`C_FLOAT`	for `mkl_sparse_s_create_coo`
`C_DOUBLE`	for `mkl_sparse_d_create_coo`
`C_FLOAT_COMPLEX`	for `mkl_sparse_c_create_coo`
`C_DOUBLE_COMPLEX`	for `mkl_sparse_z_create_coo`

Array of length nnz , containing the stored elements of matrix A. Refer to values array description in Coordinate Format for more details.

NOTE:

Notice that the \(k\)-th element of values should correspond to the \(k\)-th element of row_indx and col_indx, but the (row, col, val) triples can be stored in arbitrary order within the arrays. There is no native sorted state for COO format like there is for some other sparse formats and many applications that use COO format, do so because it can support arbitrary order.

Output Parameters

A: SPARSE_MATRIX_T. Handle containing internal data.

stat

INTEGER

Value indicating whether the operation was successful, and if not, why:

`SPARSE_STATUS_SUCCESS`	The operation was successful.
`SPARSE_STATUS_NOT_INITIALIZED`	The routine encountered an empty handle or matrix array.
`SPARSE_STATUS_ALLOC_FAILED`	Internal memory allocation failed.
`SPARSE_STATUS_INVALID_VALUE`	The input parameters contain an invalid value.
`SPARSE_STATUS_EXECUTION_FAILED`	Execution failed.
`SPARSE_STATUS_INTERNAL_ERROR`	An error in algorithm implementation occurred.
`SPARSE_STATUS_NOT_SUPPORTED`	The requested operation is not supported.

Return Values

See Output Parameter, stat.

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Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

mkl_sparse_?_create_coo

Syntax

Include Files

Description

Input Parameters

Output Parameters

Return Values