---
title: "absolute(_:result:)"
framework: accelerate
role: symbol
role_heading: Type Method
path: "accelerate/vdsp/absolute(_:result:)-1wu9x"
---

# absolute(_:result:)

Calculates the absolute value of each element in the supplied double-precision complex vector.

## Declaration

```swift
static func absolute<V>(_ vector: DSPDoubleSplitComplex, result: inout V) where V : AccelerateMutableBuffer, V.Element == Double
```

## Parameters

- `vector`: The source vector.
- `result`: On output, the absolute values of the elements in the source vector.

## Discussion

Discussion This function returns the square roots of the sum of the squares of the real and imaginary parts of each complex element. For example, the following code calculates the absolute values of four complex numbers:     let n = 4          let reals = UnsafeMutableBufferPointer<Double>.allocate(capacity: n)     _ = reals.initialize(from: [ -3, -6, 5, 9 ])          let imaginaries = UnsafeMutableBufferPointer<Double>.allocate(capacity: n)     _ = imaginaries.initialize(from: [ 4, -8, -12, 12 ])          let values = DSPDoubleSplitComplex(realp: reals.baseAddress!,                                        imagp: imaginaries.baseAddress!)               let absoluteValues = [Double](unsafeUninitializedCapacity: n) {         buffer, initializedCount in                  vDSP.absolute(values, result: &buffer)                  initializedCount = n     }          // Prints "[5.0, 10.0, 13.0, 15.0]".     print(absoluteValues)

## See Also

### Complex vector absolute functions

- [absolute(_:result:)](accelerate/vdsp/absolute(_:result:)-9x5jn.md)