---
title: "init(learningRate:gradientRescale:regularizationType:regularizationScale:)"
framework: metalperformanceshaders
role: symbol
role_heading: Initializer
path: "metalperformanceshaders/mpsnnoptimizerdescriptor/init(learningrate:gradientrescale:regularizationtype:regularizationscale:)"
---

# init(learningRate:gradientRescale:regularizationType:regularizationScale:)

## Declaration

```swift
init(learningRate: Float, gradientRescale: Float, regularizationType: MPSNNRegularizationType, regularizationScale: Float)
```