# Conversion from Other Formats Create sparse matrices from coordinate format arrays and BLAS opaque matrices. ## Topics ### Support for coordinate format arrays [`func SparseConvertFromCoordinate(Int32, Int32, Int, UInt8, SparseAttributes_t, UnsafePointer, UnsafePointer, UnsafePointer) -> SparseMatrix_Double`](/documentation/Accelerate/SparseConvertFromCoordinate(_:_:_:_:_:_:_:_:)-4n2el) Converts from coordinate format arrays to a matrix of real double-precision values, dropping out-of-range entries and summing duplicates. [`func SparseConvertFromCoordinate(Int32, Int32, Int, UInt8, SparseAttributes_t, UnsafePointer, UnsafePointer, UnsafePointer) -> SparseMatrix_Float`](/documentation/Accelerate/SparseConvertFromCoordinate(_:_:_:_:_:_:_:_:)-4n2th) Converts from coordinate format arrays to a matrix of real single-precision values, dropping out-of-range entries and summing duplicates. [`func SparseConvertFromCoordinate(Int32, Int32, Int, UInt8, SparseAttributes_t, UnsafePointer, UnsafePointer, UnsafePointer, UnsafeMutableRawPointer, UnsafeMutableRawPointer) -> SparseMatrix_Double`](/documentation/Accelerate/SparseConvertFromCoordinate(_:_:_:_:_:_:_:_:_:_:)-56hv8) Converts from coordinate format arrays to a matrix of real double-precision values, dropping out-of-range entries and summing duplicates, without any internal memory allocations. [`func SparseConvertFromCoordinate(Int32, Int32, Int, UInt8, SparseAttributes_t, UnsafePointer, UnsafePointer, UnsafePointer, UnsafeMutableRawPointer, UnsafeMutableRawPointer) -> SparseMatrix_Float`](/documentation/Accelerate/SparseConvertFromCoordinate(_:_:_:_:_:_:_:_:_:_:)-84plp) Converts from coordinate format arrays to a matrix of real single-precision values, dropping out-of-range entries and summing duplicates, without any internal memory allocations. ### Support for complex coordinate format arrays [`func SparseConvertFromCoordinate(Int32, Int32, Int, UInt8, SparseAttributesComplex_t, UnsafePointer, UnsafePointer, OpaquePointer) -> SparseMatrix_Complex_Double`](/documentation/Accelerate/SparseConvertFromCoordinate(_:_:_:_:_:_:_:_:)-58kub) Convert from coordinate format arrays to a matrix of complex double values, dropping out-of-range entries and summing duplicates. [`func SparseConvertFromCoordinate(Int32, Int32, Int, UInt8, SparseAttributesComplex_t, UnsafePointer, UnsafePointer, OpaquePointer) -> SparseMatrix_Complex_Float`](/documentation/Accelerate/SparseConvertFromCoordinate(_:_:_:_:_:_:_:_:)-58lgv) Convert from coordinate format arrays to a matrix of complex float values, dropping out-of-range entries and summing duplicates. [`func SparseConvertFromCoordinate(Int32, Int32, Int, UInt8, SparseAttributesComplex_t, UnsafePointer, UnsafePointer, OpaquePointer, UnsafeMutableRawPointer, UnsafeMutableRawPointer) -> SparseMatrix_Complex_Float`](/documentation/Accelerate/SparseConvertFromCoordinate(_:_:_:_:_:_:_:_:_:_:)-2blwb) Convert from coordinate format arrays to a matrix of complex float values, dropping out-of-range entries and summing duplicates. [`func SparseConvertFromCoordinate(Int32, Int32, Int, UInt8, SparseAttributesComplex_t, UnsafePointer, UnsafePointer, OpaquePointer, UnsafeMutableRawPointer, UnsafeMutableRawPointer) -> SparseMatrix_Complex_Double`](/documentation/Accelerate/SparseConvertFromCoordinate(_:_:_:_:_:_:_:_:_:_:)-6ocm1) Convert from coordinate format arrays to a matrix of complex double values, dropping out-of-range entries and summing duplicates. ### BLAS support [`func SparseConvertFromOpaque(sparse_matrix_double) -> SparseMatrix_Double`](/documentation/Accelerate/SparseConvertFromOpaque(_:)-6n7rw) Returns a sparse matrix of double-precision, floating-point values from a BLAS opaque matrix. [`func SparseConvertFromOpaque(sparse_matrix_float) -> SparseMatrix_Float`](/documentation/Accelerate/SparseConvertFromOpaque(_:)-4u519) Returns a sparse matrix of single-precision, floating-point values from a BLAS opaque matrix. [`func SparseConvertFromOpaque(sparse_matrix_float_complex) -> SparseMatrix_Complex_Float`](/documentation/Accelerate/SparseConvertFromOpaque(_:)-9ll2d) Converts an opaque matrix of complex float values object to a transparent sparse matrix object. When you are done with this matrix, release the memory that has been allocated by calling `SparseCleanup` on it. [`func SparseConvertFromOpaque(sparse_matrix_double_complex) -> SparseMatrix_Complex_Double`](/documentation/Accelerate/SparseConvertFromOpaque(_:)-9xju4) Converts an opaque matrix of complex double values object to a transparent sparse matrix object. When you are done with this matrix, release the memory that has been allocated by calling `SparseCleanup` on it. --- 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)