<!--
{
  "documentType" : "article",
  "framework" : "Accelerate",
  "identifier" : "/documentation/Accelerate/coherence-function-computation",
  "metadataVersion" : "0.1.0",
  "role" : "collectionGroup",
  "title" : "Coherence function computation"
}
-->

# Coherence function computation

Compute the coherence of two vectors.

## Topics

### Vector-to-Vector Coherence Function Computation

[`extern void vDSP_zcoher(const float *__A, const float *__B, const DSPSplitComplex *__C, float *__D, vDSP_Length __N);`](/documentation/Accelerate/vDSP_zcoher)

Computes the coherence function of two single-precision vectors.

[`extern void vDSP_zcoherD(const double *__A, const double *__B, const DSPDoubleSplitComplex *__C, double *__D, vDSP_Length __N);`](/documentation/Accelerate/vDSP_zcoherD)

Computes the coherence function of two double-precision vectors.


---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)