---
title: "subtract(multiplication:_:result:)"
framework: accelerate
role: symbol
role_heading: Type Method
path: "accelerate/vdsp/subtract(multiplication:_:result:)-6b91s"
---

# subtract(multiplication:_:result:)

Calculates the single-precision element-wise difference of a vector and the product of two vectors.

## Declaration

```swift
static func subtract<S, T, U, V>(multiplication: (a: T, b: U), _ vector: S, result: inout V) where S : AccelerateBuffer, T : AccelerateBuffer, U : AccelerateBuffer, V : AccelerateMutableBuffer, S.Element == Float, T.Element == Float, U.Element == Float, V.Element == Float
```

## Parameters

- `multiplication`: A tuple that contains the vectors A and B in D = (A * B) - C.
- `vector`: The input vector C in D = (A * B) - C.
- `result`: The output vector D in D = (A * B) - C.

## Discussion

Discussion This function calculates the products of the first N elements of A and B, subtracts each product from the corresponding value in C, and writes the result to D.  for (n = 0; n < N; ++n)     D[n] = (A[n] * B[n]) - C[n];

The following code shows an example of using this function:     let count = 5          let a: [Float] = [ 1,  2,  3,  4,  5]     let b: [Float] = [10, 20, 30, 40, 50]     let c: [Float] = [ 5,  4,  3,  2,  1]          let d = [Float](unsafeUninitializedCapacity: count) {         buffer, initializedCount in                  vDSP.subtract(multiplication: (a, b),                        c,                       result: &buffer)                  initializedCount = count     }          // Prints "[5.0, 36.0, 87.0, 158.0, 249.0]".     print(d)

## See Also

### Subtraction

- [subtract(_:_:)](accelerate/vdsp/subtract(_:_:)-8o5ai.md)
- [subtract(_:_:)](accelerate/vdsp/subtract(_:_:)-9xmo8.md)
- [subtract(_:_:result:)](accelerate/vdsp/subtract(_:_:result:)-1ianx.md)
- [subtract(_:_:result:)](accelerate/vdsp/subtract(_:_:result:)-2p3fa.md)
- [subtract(_:from:count:result:)](accelerate/vdsp/subtract(_:from:count:result:)-4p5xd.md)
- [subtract(_:from:count:result:)](accelerate/vdsp/subtract(_:from:count:result:)-80zi9.md)
- [subtract(multiplication:_:)](accelerate/vdsp/subtract(multiplication:_:)-2hhme.md)
- [subtract(multiplication:_:)](accelerate/vdsp/subtract(multiplication:_:)-9gphg.md)
- [subtract(multiplication:_:)](accelerate/vdsp/subtract(multiplication:_:)-3zm6l.md)
- [subtract(multiplication:_:)](accelerate/vdsp/subtract(multiplication:_:)-6u3sp.md)
- [subtract(multiplication:_:result:)](accelerate/vdsp/subtract(multiplication:_:result:)-9p12h.md)
- [subtract(multiplication:_:result:)](accelerate/vdsp/subtract(multiplication:_:result:)-86gx3.md)
- [subtract(multiplication:_:result:)](accelerate/vdsp/subtract(multiplication:_:result:)-3f2bw.md)
- [subtract(multiplication:multiplication:)](accelerate/vdsp/subtract(multiplication:multiplication:)-22a4b.md)
- [subtract(multiplication:multiplication:)](accelerate/vdsp/subtract(multiplication:multiplication:)-1ghyu.md)