---
title: featureColumns
framework: Create ML
role: symbol
role_heading: Instance Property
platforms: [macOS 10.15+]
path: createml/mlactivityclassifier/featurecolumns
---

# featureColumns

The names of the feature columns the activity classifier used during its training session.

## Declaration

```swift
var featureColumns: [String]
```

## Discussion

Discussion Changing the value of this property doesn’t retrain the model or affect its behavior.

## See Also

### Inspecting an activity classifier model

- [model](createml/mlactivityclassifier/model.md)
- [modelParameters](createml/mlactivityclassifier/modelparameters-swift.property.md)
- [labelColumn](createml/mlactivityclassifier/labelcolumn.md)
- [recordingFileColumn](createml/mlactivityclassifier/recordingfilecolumn.md)