---
title: "changingLayout(to:)"
framework: coreml
role: symbol
role_heading: Instance Method
path: "coreml/mlshapedarrayslice/changinglayout(to:)"
---

# changingLayout(to:)

Returns a copy with the specified buffer layout.

## Declaration

```swift
func changingLayout(to bufferLayout: MLShapedArrayBufferLayout) -> MLShapedArraySlice<Scalar>
```

## Parameters

- `bufferLayout`: The desired buffer layout.

## Discussion

Discussion The returned shaped array slice will have .strides property according to the requested layout. The function may return a heap-memory backed shaped array even if self is backed by a pixel buffer. let source = MLShapedArray<Int32>(scalars: 0..., shape: [4, 4]) let slice = source[1...2, 1...2] // slice.shape == [2, 2]

// Returns a new MLShapedArraySlice with the specified strides. _ = slice.changingLayout(to: .custom(strides: [3, 1]))

// Returns a new MLShapedArraySlice with the first-major contiguous layout. _ = source.changingLayout(to: .firstMajorContiguous) // strides = [2, 1]

// Returns a new MLShapedArraySlice with the last-major contiguous layout. _ = source.changingLayout(to: .lastMajorContiguous) // strides = [1, 2] The withUnsafeShapedBufferPointer function provides read-only access to the underlying buffer of the layout. The withUnsafeMutableShapedBufferPointer(body:) function may provide a buffer of different layout due to copy-on-write. Use withUnsafeMutableShapedBufferPointer(bufferLayout:body:) if you need a specific buffer layout. It raises a precondition error if the custom strides and the shape have different ranks.

## See Also

### Shaping the array slice

- [expandingShape(at:)](coreml/mlshapedarrayslice/expandingshape(at:).md)
- [reshaped(to:)](coreml/mlshapedarrayslice/reshaped(to:).md)
- [squeezingShape()](coreml/mlshapedarrayslice/squeezingshape().md)
- [transposed()](coreml/mlshapedarrayslice/transposed().md)
- [transposed(permutation:)](coreml/mlshapedarrayslice/transposed(permutation:).md)