# Sparse Iterate Functions Perform a single iteration of the specified iterative method. ## Topics ### Sparse Iterate Functions [`func SparseIterate(SparseIterativeMethod, Int32, UnsafePointer, UnsafeMutableRawPointer, (Bool, CBLAS_TRANSPOSE, DenseMatrix_Double, DenseMatrix_Double) -> Void, DenseMatrix_Double, DenseMatrix_Double, DenseMatrix_Double)`](/documentation/Accelerate/SparseIterate(_:_:_:_:_:_:_:_:)-c54n) Performs a single iteration of the specified iterative method for double-precision matrices. [`func SparseIterate(SparseIterativeMethod, Int32, UnsafePointer, UnsafeMutableRawPointer, (Bool, CBLAS_TRANSPOSE, DenseMatrix_Float, DenseMatrix_Float) -> Void, DenseMatrix_Float, DenseMatrix_Float, DenseMatrix_Float)`](/documentation/Accelerate/SparseIterate(_:_:_:_:_:_:_:_:)-1el7r) Performs a single iteration of the specified iterative method for single-precision matrices. ### Sparse Iterate Functions with Preconditioner [`func SparseIterate(SparseIterativeMethod, Int32, UnsafePointer, UnsafeMutableRawPointer, (Bool, CBLAS_TRANSPOSE, DenseMatrix_Double, DenseMatrix_Double) -> Void, DenseMatrix_Double, DenseMatrix_Double, DenseMatrix_Double, SparseOpaquePreconditioner_Double)`](/documentation/Accelerate/SparseIterate(_:_:_:_:_:_:_:_:_:)-99ji7) Performs a single iteration of the specified iterative method for double-precision matrices, applying a preconditioner. [`func SparseIterate(SparseIterativeMethod, Int32, UnsafePointer, UnsafeMutableRawPointer, (Bool, CBLAS_TRANSPOSE, DenseMatrix_Float, DenseMatrix_Float) -> Void, DenseMatrix_Float, DenseMatrix_Float, DenseMatrix_Float, SparseOpaquePreconditioner_Float)`](/documentation/Accelerate/SparseIterate(_:_:_:_:_:_:_:_:_:)-1anay) Performs a single iteration of the specified iterative method for single-precision matrices, applying a preconditioner. [`func SparseIterate(SparseIterativeMethod, Int32, UnsafePointer, UnsafeMutableRawPointer, (Bool, CBLAS_TRANSPOSE, DenseMatrix_Complex_Double, DenseMatrix_Complex_Double) -> Void, DenseMatrix_Complex_Double, DenseMatrix_Complex_Double, DenseMatrix_Complex_Double)`](/documentation/Accelerate/SparseIterate(_:_:_:_:_:_:_:_:)-315ym) Perform a single iteration of the specified iterative method for complex double values. [`func SparseIterate(SparseIterativeMethod, Int32, UnsafePointer, UnsafeMutableRawPointer, (Bool, CBLAS_TRANSPOSE, DenseMatrix_Complex_Float, DenseMatrix_Complex_Float) -> Void, DenseMatrix_Complex_Float, DenseMatrix_Complex_Float, DenseMatrix_Complex_Float)`](/documentation/Accelerate/SparseIterate(_:_:_:_:_:_:_:_:)-9v7qh) Perform a single iteration of the specified iterative method for complex float values. [`func SparseIterate(SparseIterativeMethod, Int32, UnsafePointer, UnsafeMutableRawPointer, (Bool, CBLAS_TRANSPOSE, DenseMatrix_Complex_Double, DenseMatrix_Complex_Double) -> Void, DenseMatrix_Complex_Double, DenseMatrix_Complex_Double, DenseMatrix_Complex_Double, SparseOpaquePreconditioner_Complex_Double)`](/documentation/Accelerate/SparseIterate(_:_:_:_:_:_:_:_:_:)-1wv28) Perform a single iteration of the specified iterative method for complex double values with preconditioner. [`func SparseIterate(SparseIterativeMethod, Int32, UnsafePointer, UnsafeMutableRawPointer, (Bool, CBLAS_TRANSPOSE, DenseMatrix_Complex_Float, DenseMatrix_Complex_Float) -> Void, DenseMatrix_Complex_Float, DenseMatrix_Complex_Float, DenseMatrix_Complex_Float, SparseOpaquePreconditioner_Complex_Float)`](/documentation/Accelerate/SparseIterate(_:_:_:_:_:_:_:_:_:)-4td1l) Perform a single iteration of the specified iterative method for complex float values with preconditioner. ### Functions that Calculate Iterate State Size [`func SparseGetStateSize_Double(SparseIterativeMethod, Bool, Int32, Int32, Int32) -> Int`](/documentation/Accelerate/SparseGetStateSize_Double(_:_:_:_:_:)) Returns the size in bytes necessary for a call to the double-precision sparse iterate method. [`func SparseGetStateSize_Float(SparseIterativeMethod, Bool, Int32, Int32, Int32) -> Int`](/documentation/Accelerate/SparseGetStateSize_Float(_:_:_:_:_:)) Returns the size in bytes necessary for a call to the single-precision sparse iterate method. [`func SparseGetStateSize_Complex_Double(SparseIterativeMethod, Bool, Int32, Int32, Int32) -> Int`](/documentation/Accelerate/SparseGetStateSize_Complex_Double(_:_:_:_:_:)) Returns size in bytes of state space required for call to `SparseIterate()` for complex double values. [`func SparseGetStateSize_Complex_Float(SparseIterativeMethod, Bool, Int32, Int32, Int32) -> Int`](/documentation/Accelerate/SparseGetStateSize_Complex_Float(_:_:_:_:_:)) Returns size in bytes of state space required for call to `SparseIterate()` for complex float values. --- 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)