---
title: "init(device:a:)"
framework: metalperformanceshaders
role: symbol
role_heading: Initializer
path: "metalperformanceshaders/mpscnnneuronelu/init(device:a:)"
---

# init(device:a:)

Initializes a parametric ELU neuron filter.

## Declaration

```swift
init(device: any MTLDevice, a: Float)
```