---
title: "update(_:with:eventHandler:)"
framework: createmlcomponents
role: symbol
role_heading: Instance Method
path: "createmlcomponents/lineartimeseriesforecaster/update(_:with:eventhandler:)"
---

# update(_:with:eventHandler:)

Updates a model with a sequence of features.

## Declaration

```swift
func update(_ model: inout LinearTimeSeriesForecaster<Scalar>.Model, with input: some Sequence<AnnotatedFeature<MLShapedArray<Scalar>, MLShapedArray<Scalar>>>, 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

Discussion This method uses a sliding window to chunk the input features into features of inputWindowSize elements and annotations of forecastWindowSize elements. If you want to use a different windowing strategy, use update(_:withWindows:eventHandler:).