# Blockwise Matrix Operations Create, insert values into, and extract values from a blockwise sparse matrix. ## Topics ### Matrix creation and population [`func sparse_matrix_block_create_double(sparse_dimension, sparse_dimension, sparse_dimension, sparse_dimension) -> sparse_matrix_double!`](/documentation/Accelerate/sparse_matrix_block_create_double(_:_:_:_:)) Returns a double-precision sparse matrix object that is stored in block-entry format with a fixed block size. [`func sparse_matrix_block_create_float(sparse_dimension, sparse_dimension, sparse_dimension, sparse_dimension) -> sparse_matrix_float!`](/documentation/Accelerate/sparse_matrix_block_create_float(_:_:_:_:)) Returns a single-precision sparse matrix object that is stored in block-entry format with a fixed block size. [`func sparse_matrix_variable_block_create_double(sparse_dimension, sparse_dimension, UnsafePointer!, UnsafePointer!) -> sparse_matrix_double!`](/documentation/Accelerate/sparse_matrix_variable_block_create_double(_:_:_:_:)) Returns a double-precision sparse matrix object that is stored in block-entry format with a variable block size. [`func sparse_matrix_variable_block_create_float(sparse_dimension, sparse_dimension, UnsafePointer!, UnsafePointer!) -> sparse_matrix_float!`](/documentation/Accelerate/sparse_matrix_variable_block_create_float(_:_:_:_:)) Returns a single-precision sparse matrix object that is stored in block-entry format with a variable block size. [`func sparse_insert_block_double(sparse_matrix_double!, UnsafePointer!, sparse_dimension, sparse_dimension, sparse_index, sparse_index) -> sparse_status`](/documentation/Accelerate/sparse_insert_block_double(_:_:_:_:_:_:)) Inserts a dense block of entries into a double-precision matrix. [`func sparse_insert_block_float(sparse_matrix_float!, UnsafePointer!, sparse_dimension, sparse_dimension, sparse_index, sparse_index) -> sparse_status`](/documentation/Accelerate/sparse_insert_block_float(_:_:_:_:_:_:)) Inserts a dense block of entries into a single-precision matrix. [`func sparse_matrix_block_create_double_complex(sparse_dimension, sparse_dimension, sparse_dimension, sparse_dimension) -> sparse_matrix_double_complex!`](/documentation/Accelerate/sparse_matrix_block_create_double_complex(_:_:_:_:)) [`func sparse_matrix_block_create_float_complex(sparse_dimension, sparse_dimension, sparse_dimension, sparse_dimension) -> sparse_matrix_float_complex!`](/documentation/Accelerate/sparse_matrix_block_create_float_complex(_:_:_:_:)) ### Complex matrix creation and population [`func sparse_matrix_variable_block_create_double_complex(sparse_dimension, sparse_dimension, UnsafePointer!, UnsafePointer!) -> sparse_matrix_double_complex!`](/documentation/Accelerate/sparse_matrix_variable_block_create_double_complex(_:_:_:_:)) [`func sparse_matrix_variable_block_create_float_complex(sparse_dimension, sparse_dimension, UnsafePointer!, UnsafePointer!) -> sparse_matrix_float_complex!`](/documentation/Accelerate/sparse_matrix_variable_block_create_float_complex(_:_:_:_:)) ### Value insertion [`func sparse_insert_block_double_complex(sparse_matrix_double_complex!, OpaquePointer!, sparse_dimension, sparse_dimension, sparse_index, sparse_index) -> sparse_status`](/documentation/Accelerate/sparse_insert_block_double_complex(_:_:_:_:_:_:)) [`func sparse_insert_block_float_complex(sparse_matrix_float_complex!, OpaquePointer!, sparse_dimension, sparse_dimension, sparse_index, sparse_index) -> sparse_status`](/documentation/Accelerate/sparse_insert_block_float_complex(_:_:_:_:_:_:)) ### Value extraction [`func sparse_extract_block_double(sparse_matrix_double!, sparse_index, sparse_index, sparse_dimension, sparse_dimension, UnsafeMutablePointer!) -> sparse_status`](/documentation/Accelerate/sparse_extract_block_double(_:_:_:_:_:_:)) Extracts values from a specified block of a double-precision matrix. [`func sparse_extract_block_float(sparse_matrix_float!, sparse_index, sparse_index, sparse_dimension, sparse_dimension, UnsafeMutablePointer!) -> sparse_status`](/documentation/Accelerate/sparse_extract_block_float(_:_:_:_:_:_:)) Extracts values from a specified block of a single-precision matrix. [`func sparse_extract_block_double_complex(sparse_matrix_double_complex!, sparse_index, sparse_index, sparse_dimension, sparse_dimension, OpaquePointer!) -> sparse_status`](/documentation/Accelerate/sparse_extract_block_double_complex(_:_:_:_:_:_:)) [`func sparse_extract_block_float_complex(sparse_matrix_float_complex!, sparse_index, sparse_index, sparse_dimension, sparse_dimension, OpaquePointer!) -> sparse_status`](/documentation/Accelerate/sparse_extract_block_float_complex(_:_:_:_:_:_:)) ### Block dimension queries [`func sparse_get_block_dimension_for_row(UnsafeMutableRawPointer!, sparse_index) -> Int`](/documentation/Accelerate/sparse_get_block_dimension_for_row(_:_:)) Returns the dimension of the block for a specified row of a double-precision matrix. [`func sparse_get_block_dimension_for_col(UnsafeMutableRawPointer!, sparse_index) -> Int`](/documentation/Accelerate/sparse_get_block_dimension_for_col(_:_:)) Returns the dimension of the block for a specified column of a single-precision matrix. ### Supporting types [`typealias sparse_dimension`](/documentation/Accelerate/sparse_dimension) The dimension type. [`typealias sparse_index`](/documentation/Accelerate/sparse_index) The index type. [`typealias sparse_matrix_double`](/documentation/Accelerate/sparse_matrix_double) Sparse matrix opaque type for double. [`typealias sparse_matrix_float`](/documentation/Accelerate/sparse_matrix_float) Sparse matrix opaque type for float. [`struct sparse_status`](/documentation/Accelerate/sparse_status) The type reflecting the status of an operations. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)