---
title: "multiply(subtraction:subtraction:result:)"
framework: accelerate
role: symbol
role_heading: Type Method
path: "accelerate/vdsp/multiply(subtraction:subtraction:result:)-rubk"
---

# multiply(subtraction:subtraction:result:)

Calculates the single-precision element-wise product of the differences of two pairs of vectors.

## Declaration

```swift
static func multiply<R, S, T, U, V>(subtraction subtractionAB: (a: R, b: S), subtraction subtractionCD: (c: T, d: U), 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

- `subtractionAB`: A tuple that contains the vectors A and B in E = (A - B) * (C - D).
- `subtractionCD`: 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 products of the first N elements of the subtraction of vectors A and B and the subtraction 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.multiply(subtraction: (a, b),                       subtraction: (c, d),                       result: &buffer)                  initializedCount = count     }          // Prints "[405.0, 648.0, 729.0, 648.0, 405.0]".     print(e)

## See Also

### Multiplication

- [multiply(_:_:)](accelerate/vdsp/multiply(_:_:)-9dxnc.md)
- [multiply(_:_:)](accelerate/vdsp/multiply(_:_:)-1ckqt.md)
- [multiply(_:_:)](accelerate/vdsp/multiply(_:_:)-993yp.md)
- [multiply(_:_:)](accelerate/vdsp/multiply(_:_:)-9zgw.md)
- [multiply(_:_:result:)](accelerate/vdsp/multiply(_:_:result:)-4xorc.md)
- [multiply(_:_:result:)](accelerate/vdsp/multiply(_:_:result:)-358cn.md)
- [multiply(_:_:result:)](accelerate/vdsp/multiply(_:_:result:)-3ptjl.md)
- [multiply(_:_:result:)](accelerate/vdsp/multiply(_:_:result:)-155f3.md)
- [multiply(_:by:count:useConjugate:result:)](accelerate/vdsp/multiply(_:by:count:useconjugate:result:)-4idx8.md)
- [multiply(_:by:count:useConjugate:result:)](accelerate/vdsp/multiply(_:by:count:useconjugate:result:)-79r8u.md)
- [multiply(_:by:result:)](accelerate/vdsp/multiply(_:by:result:)-8b9eq.md)
- [multiply(_:by:result:)](accelerate/vdsp/multiply(_:by:result:)-8jyhd.md)
- [multiply(addition:_:)](accelerate/vdsp/multiply(addition:_:)-4c9in.md)
- [multiply(addition:_:)](accelerate/vdsp/multiply(addition:_:)-1wt61.md)
- [multiply(addition:_:)](accelerate/vdsp/multiply(addition:_:)-4fnbx.md)