# LinearRegressor A linear regressor. ``` struct LinearRegressor where Scalar : MLShapedArrayScalar, Scalar : BinaryFloatingPoint ``` ## Topics ### Creating a regressor [`init(configuration: LinearRegressor.Configuration)`](/documentation/CreateMLComponents/LinearRegressor/init(configuration:)) Creates a linear regressor. [`struct Configuration`](/documentation/CreateMLComponents/LinearRegressor/Configuration-swift.struct) A linear regressor configuration. ### Getting the configuration [`var configuration: LinearRegressor.Configuration`](/documentation/CreateMLComponents/LinearRegressor/configuration-swift.property) The linear regressor configuration. ### Encoding and decoding [`func encodeWithOptimizer(LinearRegressorModel, to: inout any EstimatorEncoder) throws`](/documentation/CreateMLComponents/LinearRegressor/encodeWithOptimizer(_:to:)) Encodes the transformer and optimizer to an encoder. [`func decodeWithOptimizer(from: inout any EstimatorDecoder) throws -> LinearRegressorModel`](/documentation/CreateMLComponents/LinearRegressor/decodeWithOptimizer(from:)) Reads the encoded transformer and optimizer with a decoder. ### Fitting [`func fitted(to: Input, eventHandler: EventHandler?) async throws -> LinearRegressorModel`](/documentation/CreateMLComponents/LinearRegressor/fitted(to:eventHandler:)) Fits a linear regressor model to a sequence of examples. [`func fitted(to: Input, validateOn: Validation, eventHandler: EventHandler?) async throws -> LinearRegressorModel`](/documentation/CreateMLComponents/LinearRegressor/fitted(to:validateOn:eventHandler:)) Fits a linear regressor model to a sequence of examples. [`typealias Annotation`](/documentation/CreateMLComponents/LinearRegressor/Annotation) The annotation type. [`typealias Transformer`](/documentation/CreateMLComponents/LinearRegressor/Transformer) The transformer type created by this estimator. ### Default Implementations [UpdatableSupervisedEstimator Implementations](/documentation/CreateMLComponents/LinearRegressor/UpdatableSupervisedEstimator-Implementations) ## Relationships ### Conforms To [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`Copyable`](/documentation/Swift/Copyable) [`Sendable`](/documentation/Swift/Sendable) [`UpdatableSupervisedEstimator`](/documentation/CreateMLComponents/UpdatableSupervisedEstimator) [`SupervisedEstimator`](/documentation/CreateMLComponents/SupervisedEstimator) [`Escapable`](/documentation/Swift/Escapable) --- Copyright © 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)