# Sparse Refactor Functions Recompute a factorization using the numerical data from a matrix. ## Topics ### Matrix Refactorization Functions [`func SparseRefactor(SparseMatrix_Double, UnsafeMutablePointer)`](/documentation/Accelerate/SparseRefactor(_:_:)-8vrf5) Computes a factorization of the specified double-precision matrix using an existing factorization’s storage. [`func SparseRefactor(SparseMatrix_Float, UnsafeMutablePointer)`](/documentation/Accelerate/SparseRefactor(_:_:)-21q4x) Computes a factorization of the specified single-precision matrix using an existing factorization’s storage. [`func SparseRefactor(SparseMatrix_Double, UnsafeMutablePointer, SparseNumericFactorOptions)`](/documentation/Accelerate/SparseRefactor(_:_:_:)-6ttkd) Computes a factorization of the specified double-precision matrix using an existing factorization’s storage and specified options. [`func SparseRefactor(SparseMatrix_Float, UnsafeMutablePointer, SparseNumericFactorOptions)`](/documentation/Accelerate/SparseRefactor(_:_:_:)-2ovxs) Computes a factorization of the specified single-precision matrix using an existing factorization’s storage and specified options. [`func SparseRefactor(SparseMatrix_Complex_Double, UnsafeMutablePointer)`](/documentation/Accelerate/SparseRefactor(_:_:)-mgni) Reuses supplied factorization object’s storage to compute a new factorization of the supplied matrix of complex double values. [`func SparseRefactor(SparseMatrix_Complex_Float, UnsafeMutablePointer)`](/documentation/Accelerate/SparseRefactor(_:_:)-zegz) Reuses supplied factorization object’s storage to compute a new factorization of the supplied matrix of complex float values. [`func SparseRefactor(SparseMatrix_Complex_Float, UnsafeMutablePointer, SparseNumericFactorOptions)`](/documentation/Accelerate/SparseRefactor(_:_:_:)-4chx2) Reuses supplied factorization object’s storage to compute a new factorization of the supplied matrix of complex float values, using different options. [`func SparseRefactor(SparseMatrix_Complex_Double, UnsafeMutablePointer, SparseNumericFactorOptions)`](/documentation/Accelerate/SparseRefactor(_:_:_:)-q0va) Reuses supplied factorization object’s storage to compute a new factorization of the supplied matrix of complex double values, using different options. ### Matrix Refactorizations Functions with User-Defined Workspace [`func SparseRefactor(SparseMatrix_Double, UnsafeMutablePointer, UnsafeMutableRawPointer)`](/documentation/Accelerate/SparseRefactor(_:_:_:)-9mqeq) Computes a factorization of the specified double-precision matrix using an existing factorization’s storage, without internal memory allocation. [`func SparseRefactor(SparseMatrix_Float, UnsafeMutablePointer, UnsafeMutableRawPointer)`](/documentation/Accelerate/SparseRefactor(_:_:_:)-2dqt8) Computes a factorization of the specified single-precision matrix using an existing factorization’s storage, without internal memory allocation. [`func SparseRefactor(SparseMatrix_Double, UnsafeMutablePointer, SparseNumericFactorOptions, UnsafeMutableRawPointer)`](/documentation/Accelerate/SparseRefactor(_:_:_:_:)-59ehf) Computes a factorization of the specified double-precision matrix using an existing factorization’s storage and specified options, and without internal memory allocation. [`func SparseRefactor(SparseMatrix_Float, UnsafeMutablePointer, SparseNumericFactorOptions, UnsafeMutableRawPointer)`](/documentation/Accelerate/SparseRefactor(_:_:_:_:)-8i8vi) Computes a factorization of the specified single-precision matrix using an existing factorization’s storage and specified options, and without internal memory allocation. [`func SparseRefactor(SparseMatrix_Complex_Float, UnsafeMutablePointer, UnsafeMutableRawPointer)`](/documentation/Accelerate/SparseRefactor(_:_:_:)-4ofvz) Reuses supplied factorization object’s storage to compute a new factorization of the supplied matrix of complex float values, without any internal allocations. [`func SparseRefactor(SparseMatrix_Complex_Double, UnsafeMutablePointer, UnsafeMutableRawPointer)`](/documentation/Accelerate/SparseRefactor(_:_:_:)-593yb) Reuses supplied factorization object’s storage to compute a new factorization of the supplied matrix of complex double values, without any internal allocations. [`func SparseRefactor(SparseMatrix_Complex_Float, UnsafeMutablePointer, SparseNumericFactorOptions, UnsafeMutableRawPointer)`](/documentation/Accelerate/SparseRefactor(_:_:_:_:)-201rh) Reuses supplied factorization object’s storage to compute a new factorization of the supplied matrix of complex float values, using updated options and without any internal allocations. [`func SparseRefactor(SparseMatrix_Complex_Double, UnsafeMutablePointer, SparseNumericFactorOptions, UnsafeMutableRawPointer)`](/documentation/Accelerate/SparseRefactor(_:_:_:_:)-20xqc) Reuses supplied factorization object’s storage to compute a new factorization of the supplied matrix of complex double values, using updated options and without any internal allocations. ### Numeric Factorization Options [`struct SparseNumericFactorOptions`](/documentation/Accelerate/SparseNumericFactorOptions) A structure that contains options that affect the numerical stage of a sparse factorization. --- Copyright © 2026 Apple Inc. 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