---
title: "cnnNeuronDescriptor(with:a:b:)"
framework: metalperformanceshaders
role: symbol
role_heading: Type Method
path: "metalperformanceshaders/mpsnnneurondescriptor/cnnneurondescriptor(with:a:b:)"
---

# cnnNeuronDescriptor(with:a:b:)

## Declaration

```swift
class func cnnNeuronDescriptor(with neuronType: MPSCNNNeuronType, a: Float, b: Float) -> MPSNNNeuronDescriptor
```