# init(features:annotations:inputWindowSize:forecastWindowSize:stride:shufflesElements:) Creates a batch sequence. ``` init(features: MLShapedArray, annotations: MLShapedArray, inputWindowSize: Int, forecastWindowSize: Int, stride: Int = 1, shufflesElements: Bool = true) throws ``` ## Parameters `features` A shaped array of features, it must have two dimensions. `annotations` A shaped array of annotations, it must have two dimensions. `inputWindowSize` The number of input samples. Must be positive. `forecastWindowSize` The number of prediction samples. Must be positive. `stride` The number of samples between windows. Must be positive. Defaults to 1. `shufflesElements` A Boolean value indicating whether to shuffle the elements. Defaults to true. --- 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)