---
title: SparsePreconditionerDiagScaling
framework: accelerate
role: symbol
role_heading: Global Variable
path: accelerate/sparsepreconditionerdiagscaling
---

# SparsePreconditionerDiagScaling

A diagonal scaling preconditioner.

## Declaration

```swift
var SparsePreconditionerDiagScaling: SparsePreconditioner_t { get }
```

## Discussion

Discussion SparsePreconditionerDiagScaling provides a simple preconditioner for the least squares minimal residual (LSMR) method.

## See Also

### Constants

- [SparsePreconditionerDiagonal](accelerate/sparsepreconditionerdiagonal.md)
- [SparsePreconditionerNone](accelerate/sparsepreconditionernone.md)
- [SparsePreconditionerUser](accelerate/sparsepreconditioneruser.md)