---
title: "matrix_from_diagonal(_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/matrix_from_diagonal(_:)-71pds"
---

# matrix_from_diagonal(_:)

Returns a new matrix with the specified vector on the main diagonal.

## Declaration

```swift
func matrix_from_diagonal(_ d: SIMD4<Float>) -> simd_float4x4
```

## See Also

### Deprecated Symbols

- [matrix_invert(_:)](simd/matrix_invert(_:)-7fevy.md)
- [matrix_determinant(_:)](simd/matrix_determinant(_:)-4yqoy.md)
- [matrix_equal(_:_:)](simd/matrix_equal(_:_:)-752xl.md)
- [matrix_from_columns(_:_:_:_:)](simd/matrix_from_columns(_:_:_:_:)-5d0yw.md)
- [matrix_transpose(_:)](simd/matrix_transpose(_:)-8t44c.md)
- [cmatrix](simd/simd_float4x4/cmatrix.md)
- [init(_:)](simd/simd_float4x4/init(_:)-2ga0f.md)