# UpdatableEstimator An estimator that can be incrementally updated. ``` protocol UpdatableEstimator : Estimator ``` ## Topics ### Adapting [`func adaptedAsSupervised(annotationType: Annotation.Type) -> UpdatableEstimatorToSupervisedAdaptor`](/documentation/CreateMLComponents/UpdatableEstimator/adaptedAsSupervised(annotationType:)) Exposes this estimator as a supervised estimator. [`func adaptedAsTemporal() -> UpdatableEstimatorToTemporalAdaptor`](/documentation/CreateMLComponents/UpdatableEstimator/adaptedAsTemporal()) Exposes this estimator as a temporal estimator. ### Appending [`func appending(_:)`](/documentation/CreateMLComponents/UpdatableEstimator/appending(_:)) Composes this updatable estimator with another updatable estimator. ### Encoding and decoding [`func encodeWithOptimizer(Self.Transformer, to: inout any EstimatorEncoder) throws`](/documentation/CreateMLComponents/UpdatableEstimator/encodeWithOptimizer(_:to:)) Encodes the transformer and optimizer to an encoder. [`func decodeWithOptimizer(from: inout any EstimatorDecoder) throws -> Self.Transformer`](/documentation/CreateMLComponents/UpdatableEstimator/decodeWithOptimizer(from:)) Reads the encoded transformer and optimizer with a decoder. ### Transforming [`func makeTransformer() -> Self.Transformer`](/documentation/CreateMLComponents/UpdatableEstimator/makeTransformer()) Creates a default-initialized transformer suitable for incremental fitting. [`func update(inout Self.Transformer, with: InputSequence, eventHandler: EventHandler?) async throws`](/documentation/CreateMLComponents/UpdatableEstimator/update(_:with:eventHandler:)) Updates a transformer with a new sequence of examples. [`func update(inout Self.Transformer, with: InputSequence) async throws`](/documentation/CreateMLComponents/UpdatableEstimator/update(_:with:)) ## Relationships ### Conforming Types [`OrdinalEncoder`](/documentation/CreateMLComponents/OrdinalEncoder) [`NumericImputer`](/documentation/CreateMLComponents/NumericImputer) [`TransformerToUpdatableEstimatorAdaptor`](/documentation/CreateMLComponents/TransformerToUpdatableEstimatorAdaptor) [`StandardScaler`](/documentation/CreateMLComponents/StandardScaler) [`PreprocessingUpdatableEstimator`](/documentation/CreateMLComponents/PreprocessingUpdatableEstimator) [`OneHotEncoder`](/documentation/CreateMLComponents/OneHotEncoder) ### Inherits From [`Estimator`](/documentation/CreateMLComponents/Estimator) --- 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)