<!--
{
  "availability" : [
    "iOS: 15.0.0 -",
    "iPadOS: 15.0.0 -",
    "macCatalyst: 15.0.0 -",
    "macOS: 12.0.0 -",
    "tvOS: 15.0.0 -",
    "visionOS: 1.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "MetalPerformanceShadersGraph",
  "identifier" : "/documentation/MetalPerformanceShadersGraph/MPSGraph/flatten2D(_:axis:name:)",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Method",
  "symbol" : {
    "kind" : "Instance Method",
    "modules" : [
      "Metal Performance Shaders Graph",
      "MetalPerformanceShadersGraph"
    ],
    "preciseIdentifier" : "c:objc(cs)MPSGraph(im)flatten2DTensor:axis:name:"
  },
  "title" : "flatten2D(_:axis:name:)"
}
-->

# flatten2D(_:axis:name:)

Creates a flatten2D operation and returns the result tensor.

```
func flatten2D(_ tensor: MPSGraphTensor, axis: Int, name: String?) -> MPSGraphTensor
```

## Parameters

`tensor`

The tensor to be flattened.

`axis`

The axis around which to flatten.

`name`

The name for the operation.

## Return Value

A valid MPSGraphTensor object.

## Discussion

Flattens dimensions before `axis` to `result[0]` and dimensions starting
from `axis` to `result[1]` and returns a rank-2 tensor as result.

---

Copyright &copy; 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)