---
title: MLActivityClassifier.ModelParameters
framework: Create ML
role: symbol
role_heading: Structure
platforms: [macOS 10.15+]
path: createml/mlactivityclassifier/modelparameters-swift.struct
---

# MLActivityClassifier.ModelParameters

Model training parameters that direct the training process for an activity classifier model.

## Declaration

```swift
struct ModelParameters
```

## Topics

### Creating parameters

- [init(validation:batchSize:maximumIterations:predictionWindowSize:)](createml/mlactivityclassifier/modelparameters-swift.struct/init(validation:batchsize:maximumiterations:predictionwindowsize:).md)
- [init(validationData:batchSize:maximumIterations:predictionWindowSize:)](createml/mlactivityclassifier/modelparameters-swift.struct/init(validationdata:batchsize:maximumiterations:predictionwindowsize:).md)
- [MLActivityClassifier.ModelParameters.Validation](createml/mlactivityclassifier/modelparameters-swift.struct/validation-swift.enum.md)

### Accessing the training parameters

- [validationData](createml/mlactivityclassifier/modelparameters-swift.struct/validationdata.md)
- [batchSize](createml/mlactivityclassifier/modelparameters-swift.struct/batchsize.md)
- [maximumIterations](createml/mlactivityclassifier/modelparameters-swift.struct/maximumiterations.md)
- [predictionWindowSize](createml/mlactivityclassifier/modelparameters-swift.struct/predictionwindowsize.md)
- [validation](createml/mlactivityclassifier/modelparameters-swift.struct/validation-swift.property.md)

### Describing parameters

- [description](createml/mlactivityclassifier/modelparameters-swift.struct/description.md)
- [debugDescription](createml/mlactivityclassifier/modelparameters-swift.struct/debugdescription.md)
- [playgroundDescription](createml/mlactivityclassifier/modelparameters-swift.struct/playgrounddescription.md)

### Default Implementations

- [CustomDebugStringConvertible Implementations](createml/mlactivityclassifier/modelparameters-swift.struct/customdebugstringconvertible-implementations.md)
- [CustomPlaygroundDisplayConvertible Implementations](createml/mlactivityclassifier/modelparameters-swift.struct/customplaygrounddisplayconvertible-implementations.md)
- [CustomStringConvertible Implementations](createml/mlactivityclassifier/modelparameters-swift.struct/customstringconvertible-implementations.md)

## Relationships

### Conforms To

- [Copyable](swift/copyable.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomPlaygroundDisplayConvertible](swift/customplaygrounddisplayconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Escapable](swift/escapable.md)

## See Also

### Supporting types

- [MLActivityClassifier.DataSource](createml/mlactivityclassifier/datasource.md)