---
title: MLActionClassifier
framework: createml
role: symbol
role_heading: Structure
path: createml/mlactionclassifier
---

# MLActionClassifier

A model you train with videos to classify a person’s body movements.

## Declaration

```swift
struct MLActionClassifier
```

## Topics

### Training an action classifier asynchronously

- [train(trainingData:parameters:sessionParameters:)](createml/mlactionclassifier/train(trainingdata:parameters:sessionparameters:).md)
- [makeTrainingSession(trainingData:parameters:sessionParameters:)](createml/mlactionclassifier/maketrainingsession(trainingdata:parameters:sessionparameters:).md)
- [resume(_:)](createml/mlactionclassifier/resume(_:).md)
- [restoreTrainingSession(sessionParameters:)](createml/mlactionclassifier/restoretrainingsession(sessionparameters:).md)

### Creating an action classifier from a checkpoint

- [init(checkpoint:)](createml/mlactionclassifier/init(checkpoint:).md)

### Training an action classifier synchronously

- [init(trainingData:parameters:)](createml/mlactionclassifier/init(trainingdata:parameters:).md)

### Evaluating an action classifier

- [evaluation(on:)](createml/mlactionclassifier/evaluation(on:).md)
- [trainingMetrics](createml/mlactionclassifier/trainingmetrics.md)
- [validationMetrics](createml/mlactionclassifier/validationmetrics.md)

### Testing an action classifier

- [prediction(from:)](createml/mlactionclassifier/prediction(from:).md)
- [predictions(from:)](createml/mlactionclassifier/predictions(from:).md)
- [MLActionClassifier.Prediction](createml/mlactionclassifier/prediction.md)

### Saving an action classifier

- [write(to:metadata:)](createml/mlactionclassifier/write(to:metadata:).md)
- [write(toFile:metadata:)](createml/mlactionclassifier/write(tofile:metadata:).md)

### Inspecting an action classifier model

- [model](createml/mlactionclassifier/model.md)
- [modelParameters](createml/mlactionclassifier/modelparameters-swift.property.md)

### Describing an action classifier

- [description](createml/mlactionclassifier/description.md)
- [debugDescription](createml/mlactionclassifier/debugdescription.md)
- [playgroundDescription](createml/mlactionclassifier/playgrounddescription.md)

### Supporting types

- [MLActionClassifier.DataSource](createml/mlactionclassifier/datasource.md)
- [MLActionClassifier.ModelParameters](createml/mlactionclassifier/modelparameters-swift.struct.md)
- [MLActionClassifier.VideoAugmentationOptions](createml/mlactionclassifier/videoaugmentationoptions.md)

### Default Implementations

- [CustomDebugStringConvertible Implementations](createml/mlactionclassifier/customdebugstringconvertible-implementations.md)
- [CustomPlaygroundDisplayConvertible Implementations](createml/mlactionclassifier/customplaygrounddisplayconvertible-implementations.md)
- [CustomStringConvertible Implementations](createml/mlactionclassifier/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)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Video models

- [Creating an Action Classifier Model](createml/creating-an-action-classifier-model.md)
- [Detecting human actions in a live video feed](createml/detecting-human-actions-in-a-live-video-feed.md)
- [MLHandActionClassifier](createml/mlhandactionclassifier.md)
- [MLStyleTransfer](createml/mlstyletransfer.md)