# NDArray.MutableRawView A type-erased mutable view over the memory owned by a tensor. ``` struct MutableRawView ``` ## Topics ### Creating a mutable raw view [`init(mutableBytes: consuming MutableRawSpan, byteOffset: Int, scalarType: NDArray.ScalarType, shape: [Int], strides: [Int], interleaveLayout: NDArray.InterleaveLayout?)`](/documentation/CoreAI/NDArray/MutableRawView/init(mutableBytes:byteOffset:scalarType:shape:strides:interleaveLayout:)) Initialize a raw view from existing raw memory, interpreted as the specified scalar type. [`init(metalBuffer: borrowing any MTLBuffer, byteOffset: Int, scalarType: NDArray.ScalarType, shape: [Int], strides: [Int], interleaveLayout: NDArray.InterleaveLayout?)`](/documentation/CoreAI/NDArray/MutableRawView/init(metalBuffer:byteOffset:scalarType:shape:strides:interleaveLayout:)) Initialize a raw view from an existing metal buffer, interpreted as the specified scalar type. [`init(ioSurface: borrowing IOSurface, byteOffset: Int, scalarType: NDArray.ScalarType, shape: [Int], strides: [Int], interleaveLayout: NDArray.InterleaveLayout?)`](/documentation/CoreAI/NDArray/MutableRawView/init(ioSurface:byteOffset:scalarType:shape:strides:interleaveLayout:)) Initialize a mutable raw view from an existing IOSurface, interpreted as the specified scalar type. ### Inspecting the view [`var scalarType: NDArray.ScalarType`](/documentation/CoreAI/NDArray/MutableRawView/scalarType) The scalar type of the ndArray. [`var shape: Span`](/documentation/CoreAI/NDArray/MutableRawView/shape) The shape of the ndArray. [`var strides: Span`](/documentation/CoreAI/NDArray/MutableRawView/strides) The strides of the ndArray. [`var mutableBytes: MutableRawSpan`](/documentation/CoreAI/NDArray/MutableRawView/mutableBytes) A mutable span over the backing bytes of this tensor. [`var interleaveLayout: NDArray.InterleaveLayout?`](/documentation/CoreAI/NDArray/MutableRawView/interleaveLayout) Returns which dimension is interleaved, and by what factor it is interleaved. Or returns `nil` if there is not an interleaved dimension. ### Creating typed views [`func view(as: T.Type) -> NDArray.MutableView`](/documentation/CoreAI/NDArray/MutableRawView/view(as:)) Create a typed `MutableView` of the same storage as this raw view. ### Converting to immutable [`var rawView: NDArray.RawView`](/documentation/CoreAI/NDArray/MutableRawView/rawView) Returns an immutable raw view over the same backing data. ### Slicing the view [`func slice(at: [indexRank of any NDArray.RangeExpression]) -> NDArray.MutableRawView`](/documentation/CoreAI/NDArray/MutableRawView/slice(at:)-47fbq) 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.MutableRawView`](/documentation/CoreAI/NDArray/MutableRawView/slice(at:)-82sdj) 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.MutableRawView`](/documentation/CoreAI/NDArray/MutableRawView/mutatingSlice(at:)-5tnq5) 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.MutableRawView`](/documentation/CoreAI/NDArray/MutableRawView/mutatingSlice(at:)-5ts4w) Returns a sub-view with the same rank as this view by slicing the dimensions at the provided ranges. ### Instance Methods [`func withUnsafeMutableBytes((UnsafeMutableRawPointer, Span, Span) throws(E) -> R) throws(E) -> R`](/documentation/CoreAI/NDArray/MutableRawView/withUnsafeMutableBytes(_:)) Invokes the provided closure with the backing data and memory layout of this view. --- 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)