# StandardScaler An estimator that standardizes the input by removing the mean and scaling to unit variance. ``` struct StandardScaler where Element : BinaryFloatingPoint, Element : Decodable, Element : Encodable ``` ## Topics ### Creating an estimator [`init()`](/documentation/CreateMLComponents/StandardScaler/init()) Creates a standard scaling estimator. ### Fitting [`func fitted(to: S, eventHandler: EventHandler?) throws -> StandardScaler.Transformer`](/documentation/CreateMLComponents/StandardScaler/fitted(to:eventHandler:)) Fits a transformer to a particular input sequence by computing the mean and standard deviation. ### Default Implementations [Estimator Implementations](/documentation/CreateMLComponents/StandardScaler/Estimator-Implementations) [UpdatableEstimator Implementations](/documentation/CreateMLComponents/StandardScaler/UpdatableEstimator-Implementations) ## Relationships ### Conforms To [`Estimator`](/documentation/CreateMLComponents/Estimator) [`Sendable`](/documentation/Swift/Sendable) [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`Copyable`](/documentation/Swift/Copyable) [`UpdatableEstimator`](/documentation/CreateMLComponents/UpdatableEstimator) [`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)