---
title: "SparseGetStateSize_Double(_:_:_:_:_:)"
framework: accelerate
role: symbol
role_heading: Function
path: "accelerate/sparsegetstatesize_double(_:_:_:_:_:)"
---

# SparseGetStateSize_Double(_:_:_:_:_:)

Returns the size in bytes necessary for a call to the double-precision sparse iterate method.

## Declaration

```swift
func SparseGetStateSize_Double(_ method: SparseIterativeMethod, _ preconditioner: Bool, _ m: Int32, _ n: Int32, _ nrhs: Int32) -> Int
```

## Parameters

- `method`: The method to return required state space size for.
- `preconditioner`: Set to true if your subsequent calls to SparseIterate use a preconditioner.
- `m`: The number of rows in matrix A.
- `n`: The number of columns in matrix A.
- `nrhs`: The number of columns in matrices B and X.

## Return Value

Return Value The size of the required state space, in bytes.

## See Also

### Functions that Calculate Iterate State Size

- [SparseGetStateSize_Float(_:_:_:_:_:)](accelerate/sparsegetstatesize_float(_:_:_:_:_:).md)
- [SparseGetStateSize_Complex_Double(_:_:_:_:_:)](accelerate/sparsegetstatesize_complex_double(_:_:_:_:_:).md)
- [SparseGetStateSize_Complex_Float(_:_:_:_:_:)](accelerate/sparsegetstatesize_complex_float(_:_:_:_:_:).md)