# NDArray.MutableView A mutable view over the storage of a tensor. ``` struct MutableView where Element : BitwiseCopyable ``` ## Topics ### Creating a mutable view [`init(mutableSpan: consuming MutableSpan, shape: [Int], strides: [Int])`](/documentation/CoreAI/NDArray/MutableView/init(mutableSpan:shape:strides:)) Initialize a view from a `MutableSpan`. ### Inspecting the view [`var isContiguous: Bool`](/documentation/CoreAI/NDArray/MutableView/isContiguous) Returns `true` if the elements in this view have a row-major contiguous layout. [`var rank: Int`](/documentation/CoreAI/NDArray/MutableView/rank) The rank of the tensor. [`var shape: Span`](/documentation/CoreAI/NDArray/MutableView/shape) The shape of the tensor. [`var strides: Span`](/documentation/CoreAI/NDArray/MutableView/strides) The strides of the tensor. [`var interleaveLayout: NDArray.InterleaveLayout?`](/documentation/CoreAI/NDArray/MutableView/interleaveLayout) Returns which dimension is interleaved, and by what factor it is interleaved. Or returns `nil` if there is not an interleaved dimension. ### Accessing elements [`var contiguousElements: MutableSpan?`](/documentation/CoreAI/NDArray/MutableView/contiguousElements) Returns a `MutableSpan` over the backing memory of this view if the memory is in a contiguous layout, otherwise returns `nil`. [`subscript(scalarAt _: InlineArray) -> Element`](/documentation/CoreAI/NDArray/MutableView/subscript(scalarAt:)) Access the element at a multi-dimensional `index`. ### Writing data [`func copyElements(from: some Sequence)`](/documentation/CoreAI/NDArray/MutableView/copyElements(from:)) Copies the elements from `sequence` into this view in row-major order. [`func copyElements(fromContentsOf: some Collection)`](/documentation/CoreAI/NDArray/MutableView/copyElements(fromContentsOf:)) Copies the elements from `collection` into this view in row-major order. ### Accessing memory [`func withUnsafeMutablePointer((UnsafeMutablePointer, Span, Span) throws(E) -> R) throws(E) -> R`](/documentation/CoreAI/NDArray/MutableView/withUnsafeMutablePointer(_:)) Invokes the provided closure with the backing data and memory layout of this view. ### Slicing the view [`func slice(at: [indexRank of any NDArray.RangeExpression]) -> NDArray.MutableView`](/documentation/CoreAI/NDArray/MutableView/slice(at:)-50cpv) Returns a sub-view with the same rank as this view by slicing the dimensions at the provided ranges. [`func slice(at: [any NDArray.RangeExpression]) -> NDArray.MutableView`](/documentation/CoreAI/NDArray/MutableView/slice(at:)-qyjq) Returns a sub-view with the same rank as this view by slicing the dimensions at the provided ranges. [`func mutatingSlice(at: [indexRank of any NDArray.RangeExpression]) -> NDArray.MutableView`](/documentation/CoreAI/NDArray/MutableView/mutatingSlice(at:)-30asd) Returns a sub-view with the same rank as this view by slicing the dimensions at the provided ranges. [`func mutatingSlice(at: [any NDArray.RangeExpression]) -> NDArray.MutableView`](/documentation/CoreAI/NDArray/MutableView/mutatingSlice(at:)-9pmi4) Returns a sub-view with the same rank as this view by slicing the dimensions at the provided ranges. ### Converting to other views [`var view: NDArray.View`](/documentation/CoreAI/NDArray/MutableView/view) An immutable view of this mutable view. [`var mutableRawView: NDArray.MutableRawView`](/documentation/CoreAI/NDArray/MutableView/mutableRawView) Returns a mutable raw view over the same data. --- 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)