---
title: "matrix_from_diagonal(_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/matrix_from_diagonal(_:)-61643"
---

# matrix_from_diagonal(_:)

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

## Declaration

```swift
func matrix_from_diagonal(_ d: SIMD3<Float>) -> simd_float3x3
```

## See Also

### Deprecated Symbols

- [matrix_invert(_:)](simd/matrix_invert(_:)-15kif.md)
- [matrix_determinant(_:)](simd/matrix_determinant(_:)-2m4vm.md)
- [matrix_equal(_:_:)](simd/matrix_equal(_:_:)-14gko.md)
- [matrix_from_columns(_:_:_:)](simd/matrix_from_columns(_:_:_:)-4c7qb.md)
- [matrix_transpose(_:)](simd/matrix_transpose(_:)-9pl1z.md)
- [init(_:)](simd/simd_float3x3/init(_:)-7ymye.md)
- [cmatrix](simd/simd_float3x3/cmatrix.md)