---
title: "subtract(multiplication:multiplication:result:)"
framework: accelerate
role: symbol
role_heading: Type Method
path: "accelerate/vdsp/subtract(multiplication:multiplication:result:)-8ofjj"
---

# subtract(multiplication:multiplication:result:)

Calculates the single-precision element-wise difference of the products of two pairs of vectors.

## Declaration

```swift
static func subtract<R, S, T, U, V>(multiplication multiplicationAB: (a: T, b: U), multiplication multiplicationCD: (c: R, d: S), result: inout V) where R : AccelerateBuffer, S : AccelerateBuffer, T : AccelerateBuffer, U : AccelerateBuffer, V : AccelerateMutableBuffer, R.Element == Float, S.Element == Float, T.Element == Float, U.Element == Float, V.Element == Float
```

## Parameters

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

## Discussion

Discussion This function calculates the differences of the first N elements of the product of vectors A and B and the product of vectors C and D.  for (n = 0; n < N; ++n)     E[n] = A[n]*B[n] - C[n]*D[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] = [50, 40, 30, 20, 10]          let e = [Float](unsafeUninitializedCapacity: count) {         buffer, initializedCount in                  vDSP.subtract(multiplication: (a, b),                       multiplication: (c, d),         result: &buffer)                  initializedCount = count     }          // Prints "[-240.0, -120.0, 0.0, 120.0, 240.0]".     print(e)

## 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:_:result:)](accelerate/vdsp/subtract(multiplication:_:result:)-6b91s.md)
- [subtract(multiplication:multiplication:)](accelerate/vdsp/subtract(multiplication:multiplication:)-22a4b.md)