---
title: "makeTrainingSession(trainingData:featureColumns:labelColumn:recordingFileColumn:parameters:sessionParameters:)"
framework: Create ML
role: symbol
role_heading: Type Method
platforms: [macOS 14.0+]
path: "createml/mlactivityclassifier/maketrainingsession(trainingdata:featurecolumns:labelcolumn:recordingfilecolumn:parameters:sessionparameters:)"
---

# makeTrainingSession(trainingData:featureColumns:labelColumn:recordingFileColumn:parameters:sessionParameters:)

Creates an asynchronous training session for an activity classifier.

## Declaration

```swift
static func makeTrainingSession(trainingData: MLActivityClassifier.DataSource, featureColumns: [String], labelColumn: String, recordingFileColumn: String, parameters: MLActivityClassifier.ModelParameters = .init(), sessionParameters: MLTrainingSessionParameters = _defaultSessionParameters) throws -> MLTrainingSession<MLActivityClassifier>
```

## Parameters

- `trainingData`: An doc://com.apple.createml/documentation/CreateML/MLDataTable instance that contains a collection of sensor data that groups data entries by activity label.
- `featureColumns`: The feature column names.
- `labelColumn`: The label column name,
- `recordingFileColumn`: The recording file column name.
- `parameters`: An doc://com.apple.createml/documentation/CreateML/MLActivityClassifier/ModelParameters-swift.struct instance you use to configure the model for the training session.
- `sessionParameters`: An doc://com.apple.createml/documentation/CreateML/MLTrainingSessionParameters instance you use to configure the training session.

## Return Value

Return Value An MLTrainingSession that represents the activity classifier training session.

## See Also

### Training an activity classifier asynchronously

- [train(trainingData:featureColumns:labelColumn:recordingFileColumn:parameters:sessionParameters:)](createml/mlactivityclassifier/train(trainingdata:featurecolumns:labelcolumn:recordingfilecolumn:parameters:sessionparameters:).md)
- [resume(_:)](createml/mlactivityclassifier/resume(_:).md)
- [restoreTrainingSession(sessionParameters:)](createml/mlactivityclassifier/restoretrainingsession(sessionparameters:).md)