---
title: MLLinearRegressor
framework: createml
role: symbol
role_heading: Structure
path: createml/mllinearregressor
---

# MLLinearRegressor

A regressor that estimates the target as a linear function of the features.

## Declaration

```swift
struct MLLinearRegressor
```

## Topics

### Creating a linear regressor asynchronously

- [train(trainingData:targetColumn:featureColumns:parameters:sessionParameters:)](createml/mllinearregressor/train(trainingdata:targetcolumn:featurecolumns:parameters:sessionparameters:).md)
- [makeTrainingSession(trainingData:targetColumn:featureColumns:parameters:sessionParameters:)](createml/mllinearregressor/maketrainingsession(trainingdata:targetcolumn:featurecolumns:parameters:sessionparameters:).md)
- [resume(_:)](createml/mllinearregressor/resume(_:).md)
- [restoreTrainingSession(sessionParameters:)](createml/mllinearregressor/restoretrainingsession(sessionparameters:).md)

### Creating a linear regressor from a checkpoint

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

### Training a linear regressor synchronously

- [init(trainingData:targetColumn:featureColumns:parameters:)](createml/mllinearregressor/init(trainingdata:targetcolumn:featurecolumns:parameters:).md)
- [targetColumn](createml/mllinearregressor/targetcolumn.md)
- [featureColumns](createml/mllinearregressor/featurecolumns.md)

### Evaluating a linear regressor

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

### Testing a linear regressor

- [predictions(from:)](createml/mllinearregressor/predictions(from:).md)

### Saving a linear regressor

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

### Inspecting a linear regressor

- [model](createml/mllinearregressor/model.md)
- [MLLinearRegressor.ModelParameters](createml/mllinearregressor/modelparameters-swift.struct.md)
- [modelParameters](createml/mllinearregressor/modelparameters-swift.property.md)

### Describing a linear regressor

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

### Default Implementations

- [CustomDebugStringConvertible Implementations](createml/mllinearregressor/customdebugstringconvertible-implementations.md)
- [CustomPlaygroundDisplayConvertible Implementations](createml/mllinearregressor/customplaygrounddisplayconvertible-implementations.md)
- [CustomStringConvertible Implementations](createml/mllinearregressor/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

### Supporting regressor types

- [MLDecisionTreeRegressor](createml/mldecisiontreeregressor.md)
- [MLRandomForestRegressor](createml/mlrandomforestregressor.md)
- [MLBoostedTreeRegressor](createml/mlboostedtreeregressor.md)