---
title: "init(type:a:b:c:)"
framework: ML Compute
role: symbol
role_heading: Initializer
platforms: [iOS 14.0+, iPadOS 14.0+, Mac Catalyst 14.0+, macOS 11.0+, tvOS 14.0+]
path: "mlcompute/mlcactivationdescriptor/init(type:a:b:c:)"
---

# init(type:a:b:c:)

Creates an activation descriptor with the activation type and parameters a, b, and c that you specify.

## Declaration

```swift
convenience init?(type activationType: MLCActivationType, a: Float, b: Float, c: Float)
```

## Parameters

- `activationType`: A type of activation function.
- `a`: Parameter a.
- `b`: Parameter b.
- `c`: Parameter c.

## See Also

### Creating Activation Descriptors

- [init(type:)](mlcompute/mlcactivationdescriptor/init(type:).md)
- [init(type:a:)](mlcompute/mlcactivationdescriptor/init(type:a:).md)
- [init(type:a:b:)](mlcompute/mlcactivationdescriptor/init(type:a:b:).md)
- [MLCActivationType](mlcompute/mlcactivationtype.md)