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# vDSP_zcoherD

Computes the coherence function of two double-precision vectors.

```
extern void vDSP_zcoherD(const double *__A, const double *__B, const DSPDoubleSplitComplex *__C, double *__D, vDSP_Length __N);
```

## Discussion

This function is the same as [`vDSP_zcoher`](/documentation/Accelerate/vDSP_zcoher), except for the types of vectors `A`, `B`, `C`, and `D`.

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