---
title: "matrix_from_diagonal(_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/matrix_from_diagonal(_:)-7i8pm"
---

# matrix_from_diagonal(_:)

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

## Declaration

```swift
func matrix_from_diagonal(_ d: SIMD2<Double>) -> simd_double2x2
```

## See Also

### Deprecated Symbols

- [matrix_invert(_:)](simd/matrix_invert(_:)-nkj5.md)
- [matrix_equal(_:_:)](simd/matrix_equal(_:_:)-4claa.md)
- [matrix_determinant(_:)](simd/matrix_determinant(_:)-7kglv.md)
- [matrix_from_columns(_:_:)](simd/matrix_from_columns(_:_:)-37jug.md)
- [matrix_transpose(_:)](simd/matrix_transpose(_:)-6qaez.md)
- [init(_:)](simd/simd_double2x2/init(_:)-9vxjx.md)
- [cmatrix](simd/simd_double2x2/cmatrix.md)