---
title: vDSP_ztoc
framework: accelerate
role: symbol
role_heading: Function
path: accelerate/vdsp_ztoc
---

# vDSP_ztoc

Copies the contents of a split single-precision complex vector to an interleaved vector.

## Declaration

```occ
extern void vDSP_ztoc(const DSPSplitComplex *__Z, vDSP_Stride __IZ, DSPComplex *__C, vDSP_Stride __IC, vDSP_Length __N);
```

## Parameters

- `__Z`: The split-complex input vector.
- `__IZ`: The distance between the elements in the input vector.
- `__C`: The interleaved-complex output vector.
- `__IC`: The distance between the real elements in the output vector. For example, a stride of 2 corresponds to a single complex element.
- `__N`: The number of complex elements that the function processes.

## Mentioned in

Performing Fourier transforms on interleaved-complex data Controlling vDSP operations with stride

## Discussion

Discussion For example, the following code converts the contents of a DSPSplitComplex structure to an array of DSPComplex structures :     let srcReal = UnsafeMutableBufferPointer<Float>.allocate(capacity: 4)     _ = srcReal.initialize(from: [1.0, 2.0, 3.0, 4.0])          let srcImag = UnsafeMutableBufferPointer<Float>.allocate(capacity: 4)     _ = srcImag.initialize(from: [10.0, 20.0, 30.0, 40.0])          var source = DSPSplitComplex(realp: srcReal.baseAddress!,                                  imagp: srcImag.baseAddress!)          let destination = [DSPComplex](unsafeUninitializedCapacity: 4) {         buffer, initializedCount in                  vDSP_ztoc(&source, 1,                   buffer.baseAddress!, 2,                   4)                  initializedCount = 4     }          // Prints:     //     "[ DSPComplex(real: 1.0, imag: 10.0),     //        DSPComplex(real: 2.0, imag: 20.0),     //        DSPComplex(real: 3.0, imag: 30.0),     //        DSPComplex(real: 4.0, imag: 40.0) ]".     print(destination)

## See Also

### Converting split-complex vectors to interleaved-complex vectors

- [vDSP_ztocD](accelerate/vdsp_ztocd.md)