# update(_:with:eventHandler:) Updates a model with a new sequence of examples. ``` func update(_ model: inout MultivariateLinearRegressor.Model, with input: some Sequence, MLShapedArray>>, eventHandler: EventHandler? = nil) async throws ``` ## Parameters `model` A model to update. `input` A sequence of examples. For faster updates, consider passing a single [`AnnotatedBatch`](/documentation/CreateMLComponents/AnnotatedBatch) with shaped arrays that contain multiple training examples. For example instead of passing a sequence of `N` shaped arrays with shape `[M]`, pass a single shaped array with shape `[N, M]`. See also [`update(_:with:)`](/documentation/CreateMLComponents/MultivariateLinearRegressor/update(_:with:)). `eventHandler` An event handler. This method reports the mean squared error. --- 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)