---
title: "SparseMultiply(_:_:)"
framework: accelerate
role: symbol
role_heading: Function
path: "accelerate/sparsemultiply(_:_:)-34fp6"
---

# SparseMultiply(_:_:)

Perform the multiply operation Y = Subfactor * X in place for complex float values.

## Declaration

```swift
func SparseMultiply(_ Subfactor: SparseOpaqueSubfactor_Complex_Float, _ XY: DenseMatrix_Complex_Float)
```

## Parameters

- `Subfactor`: (Input) The subfactor to multiply by, as returned by SparseCreateSubfactor().
- `XY`: (Input/Output) On input, the matrix X. On return it is overwritten with the matrix Y. If Subfactor is m x n, then XB must have dimension k x nrhs, where k = max(m, n) and nrhs is the number of right-hand side vectors. If m != n, then only the first min(m,n) entries are used for input or output as approriate.

## See Also

### Subfactor and dense matrix multiplication

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