---
title: "SparseMultiply(_:_:)"
framework: accelerate
role: symbol
role_heading: Function
path: "accelerate/sparsemultiply(_:_:)-88trz"
---

# SparseMultiply(_:_:)

Performs the multiply operation Y = Subfactor * X, __in place on a dense matrix of double-precision values.

## Declaration

```swift
func SparseMultiply(_ Subfactor: SparseOpaqueSubfactor_Double, _ XY: DenseMatrix_Double)
```

## Parameters

- `Subfactor`: The subfactor to multiply by, which doc://com.apple.accelerate/documentation/Accelerate/SparseCreateSubfactor(_:_:)-49d8w returns.
- `XY`: On input, the matrix X. On return, the matrix Y overwrites it.

## See Also

### Subfactor and dense matrix multiplication

- [SparseMultiply(_:_:)](accelerate/sparsemultiply(_:_:)-3r4mf.md)
- [SparseMultiply(_:_:_:)](accelerate/sparsemultiply(_:_:_:)-4nosz.md)
- [SparseMultiply(_:_:_:)](accelerate/sparsemultiply(_:_:_:)-88stx.md)
- [SparseMultiply(_:_:)](accelerate/sparsemultiply(_:_:)-34fp6.md)
- [SparseMultiply(_:_:)](accelerate/sparsemultiply(_:_:)-3dwed.md)
- [SparseMultiply(_:_:_:)](accelerate/sparsemultiply(_:_:_:)-6wrnf.md)
- [SparseMultiply(_:_:_:)](accelerate/sparsemultiply(_:_:_:)-7q8gs.md)