---
title: "init(descriptor:momentumScale:alpha:epsilon:isCentered:)"
framework: ML Compute
role: symbol
role_heading: Initializer
platforms: [iOS 14.0+, iPadOS 14.0+, Mac Catalyst 14.2+, macOS 11.0+, tvOS 14.0+]
path: "mlcompute/mlcrmspropoptimizer/init(descriptor:momentumscale:alpha:epsilon:iscentered:)"
---

# init(descriptor:momentumScale:alpha:epsilon:isCentered:)

Creates an RMSProp optimizer with the descriptor, momentum scale, smoothing, epsilon, and option to compute the centered RMSProp that you specify.

## Declaration

```swift
convenience init(descriptor optimizerDescriptor: MLCOptimizerDescriptor, momentumScale: Float, alpha: Float, epsilon: Float, isCentered: Bool)
```

## Parameters

- `optimizerDescriptor`: An object you use to configure the optimizer.
- `momentumScale`: The momentum scale.
- `alpha`: The smoothing constant value.
- `epsilon`: The epsilon value you use to improve numerical stability.
- `isCentered`: A Boolean that indicates whether you compute the centered RMSProp.

## See Also

### Creating an RMSProp Optimizer

- [init(descriptor:)](mlcompute/mlcrmspropoptimizer/init(descriptor:).md)