---
title: "init(device:rnnDescriptor:trainableWeights:)"
framework: metalperformanceshaders
role: symbol
role_heading: Initializer
path: "metalperformanceshaders/mpsrnnmatrixtraininglayer/init(device:rnndescriptor:trainableweights:)"
---

# init(device:rnnDescriptor:trainableWeights:)

## Declaration

```swift
init(device: any MTLDevice, rnnDescriptor: MPSRNNDescriptor, trainableWeights: NSMutableArray)
```