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# SparseMultiply(_:_:)

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

```
func SparseMultiply(_ Subfactor: SparseOpaqueSubfactor_Float, _ XY: DenseMatrix_Float)
```

## Parameters

`Subfactor`

The subfactor to multiply by, which [`SparseCreateSubfactor(_:_:)`](/documentation/Accelerate/SparseCreateSubfactor(_:_:)-4renf) returns.

`XY`

On input, the matrix *X*. On return, the matrix *Y* overwrites it.

---

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