---
title: "init(diagonal:)"
framework: simd
role: symbol
role_heading: Initializer
path: "simd/simd_double3x3/init(diagonal:)"
---

# init(diagonal:)

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

## Declaration

```swift
init(diagonal: SIMD3<Double>)
```

## See Also

### Initializers

- [init()](simd/simd_double3x3/init().md)
- [init(_:)](simd/simd_double3x3/init(_:)-6qq5k.md)
- [init(_:)](simd/simd_double3x3/init(_:)-6kw2p.md)
- [init(_:)](simd/simd_double3x3/init(_:)-9wyb6.md)
- [init(_:_:_:)](simd/simd_double3x3/init(_:_:_:).md)
- [init(columns:)](simd/simd_double3x3/init(columns:).md)
- [init(rows:)](simd/simd_double3x3/init(rows:).md)