# BoostedTreeRegressor A gradient boosted decision tree regressor. ``` struct BoostedTreeRegressor ``` ## Topics ### Creating a regressor [`init(annotationColumnName: String, featureColumnNames: [String], configuration: BoostedTreeConfiguration)`](/documentation/CreateMLComponents/BoostedTreeRegressor/init(annotationColumnName:featureColumnNames:configuration:)) Creates a boosted tree regressor. ### Getting the properties [`var annotationColumnID: ColumnID`](/documentation/CreateMLComponents/BoostedTreeRegressor/annotationColumnID) The annotation column identifier. [`var configuration: BoostedTreeConfiguration`](/documentation/CreateMLComponents/BoostedTreeRegressor/configuration) Boosted tree configuration. [`var featureColumnNames: [String]`](/documentation/CreateMLComponents/BoostedTreeRegressor/featureColumnNames) The names of the columns containing feature values. ### Fitting a regressor model [`func fitted(to: DataFrame, validateOn: DataFrame?, eventHandler: EventHandler?) async throws -> TreeRegressorModel`](/documentation/CreateMLComponents/BoostedTreeRegressor/fitted(to:validateOn:eventHandler:)) Fits a boosted tree regressor model to a collection of examples. [`typealias Transformer`](/documentation/CreateMLComponents/BoostedTreeRegressor/Transformer) The transformer type created by this estimator. ### Encoding and decoding a regressor [`func encodeWithOptimizer(TreeRegressorModel, to: inout any EstimatorEncoder) throws`](/documentation/CreateMLComponents/BoostedTreeRegressor/encodeWithOptimizer(_:to:)) Encodes the transformer and optimizer to an encoder. [`func decodeWithOptimizer(from: inout any EstimatorDecoder) throws -> TreeRegressorModel`](/documentation/CreateMLComponents/BoostedTreeRegressor/decodeWithOptimizer(from:)) Reads the encoded transformer and optimizer with a decoder. ### Default Implementations [UpdatableSupervisedTabularEstimator Implementations](/documentation/CreateMLComponents/BoostedTreeRegressor/UpdatableSupervisedTabularEstimator-Implementations) ## Relationships ### Conforms To [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`UpdatableSupervisedTabularEstimator`](/documentation/CreateMLComponents/UpdatableSupervisedTabularEstimator) [`Escapable`](/documentation/Swift/Escapable) [`SupervisedTabularEstimator`](/documentation/CreateMLComponents/SupervisedTabularEstimator) [`Sendable`](/documentation/Swift/Sendable) [`Copyable`](/documentation/Swift/Copyable) --- 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)