# update(_:with:eventHandler:) Updates a model with a sequence of features. ``` func update(_ model: inout LinearTimeSeriesForecaster.Model, with input: some Sequence, MLShapedArray>>, eventHandler: EventHandler? = nil) async throws ``` ## Parameters `model` The model to update. `input` A sequence of annotated features. The feature shape must be `[featureSize]` and the annotation shape must be `[annotationSize]`. `eventHandler` An event handler. ## Discussion This method uses a sliding window to chunk the input features into features of [`inputWindowSize`](/documentation/CreateMLComponents/LinearTimeSeriesForecaster/inputWindowSize) elements and annotations of [`forecastWindowSize`](/documentation/CreateMLComponents/LinearTimeSeriesForecaster/forecastWindowSize) elements. If you want to use a different windowing strategy, use [`update(_:withWindows:eventHandler:)`](/documentation/CreateMLComponents/LinearTimeSeriesForecaster/update(_:withWindows:eventHandler:)). --- 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)