<!--
{
  "availability" : [
    "macOS: 14.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "CreateML",
  "identifier" : "/documentation/CreateML/MLActivityClassifier/makeTrainingSession(trainingData:featureColumns:labelColumn:recordingFileColumn:parameters:sessionParameters:)",
  "metadataVersion" : "0.1.0",
  "role" : "Type Method",
  "symbol" : {
    "kind" : "Type Method",
    "modules" : [
      "Create ML"
    ],
    "preciseIdentifier" : "s:8CreateML20MLActivityClassifierV19makeTrainingSession12trainingData14featureColumns11labelColumn013recordingFileM010parameters17sessionParametersAA010MLTrainingG0CyACGAC0I6SourceO_SaySSGS2SAC05ModelR0VAA0sgR0VtKFZ::OverloadGroup"
  },
  "title" : "makeTrainingSession(trainingData:featureColumns:labelColumn:recordingFileColumn:parameters:sessionParameters:)"
}
-->

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

Creates an asynchronous training session for an activity classifier.

```
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 [`MLDataTable`](/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 [`MLActivityClassifier.ModelParameters`](/documentation/CreateML/MLActivityClassifier/ModelParameters-swift.struct) instance you use to configure the
model for the training session.

`sessionParameters`

An [`MLTrainingSessionParameters`](/documentation/CreateML/MLTrainingSessionParameters) instance you use to configure the training session.

## Return Value

An [`MLTrainingSession`](/documentation/CreateML/MLTrainingSession) that represents the activity classifier training session.

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)