# SlidingWindows A sequence of windows on a time series shaped array. ``` struct SlidingWindows where Scalar : MLShapedArrayScalar ``` ## Overview The shape of each window in the sequence is `[length, featureSize]`. The sequence will return as many windows as fit in the input. For example, an input shaped array of shape `[8, 1]` using `stride` of 1 and `length` of 4 will produce 5 examples: ``` [[1], [2], [3], [4]] [[2], [3], [4], [5]] [[3], [4], [5], [6]] [[4], [5], [6], [7]] [[5], [6], [7], [8]] ``` ## Topics ### Creating a sliding window [`init(input: MLShapedArray, length: Int, stride: Int) throws`](/documentation/CreateMLComponents/SlidingWindows/init(input:length:stride:)) Creates a sliding windows sequence. ### Inspecting the sliding window [`var endIndex: Int`](/documentation/CreateMLComponents/SlidingWindows/endIndex) The collection’s “past the end” position–that is, the position one greater than the last valid subscript argument. [`let input: MLShapedArray`](/documentation/CreateMLComponents/SlidingWindows/input) The input shaped array. [`let length: Int`](/documentation/CreateMLComponents/SlidingWindows/length) The number samples in each window. [`var startIndex: Int`](/documentation/CreateMLComponents/SlidingWindows/startIndex) The position of the first window. [`let stride: Int`](/documentation/CreateMLComponents/SlidingWindows/stride) The number of samples between windows. ### Getting the index [`func index(Int, offsetBy: Int) -> Int`](/documentation/CreateMLComponents/SlidingWindows/index(_:offsetBy:)) Returns an index that is the specified distance from the given index. [`func index(after: Int) -> Int`](/documentation/CreateMLComponents/SlidingWindows/index(after:)) Returns the position immediately after the given index. [`func index(before: Int) -> Int`](/documentation/CreateMLComponents/SlidingWindows/index(before:)) Returns the position immediately before the given index. ### Getting the subscript [`subscript(_:)`](/documentation/CreateMLComponents/SlidingWindows/subscript(_:)) Accesses a contiguous range of windows. ## Relationships ### Conforms To [`Sendable`](/documentation/Swift/Sendable) [`RandomAccessCollection`](/documentation/Swift/RandomAccessCollection) [`Collection`](/documentation/Swift/Collection) [`BidirectionalCollection`](/documentation/Swift/BidirectionalCollection) [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`Sequence`](/documentation/Swift/Sequence) --- 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)