---
title: "init(diagonal:)"
framework: simd
role: symbol
role_heading: Initializer
path: "simd/simd_double4x4/init(diagonal:)"
---

# init(diagonal:)

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

## Declaration

```swift
init(diagonal: SIMD4<Double>)
```

## See Also

### Initializers

- [init()](simd/simd_double4x4/init().md)
- [init(_:)](simd/simd_double4x4/init(_:)-184ad.md)
- [init(_:)](simd/simd_double4x4/init(_:)-ahnn.md)
- [init(_:)](simd/simd_double4x4/init(_:)-43z8y.md)
- [init(_:)](simd/simd_double4x4/init(_:)-45usb.md)
- [init(_:)](simd/simd_double4x4/init(_:)-vm0p.md)
- [init(_:_:_:_:)](simd/simd_double4x4/init(_:_:_:_:).md)
- [init(columns:)](simd/simd_double4x4/init(columns:).md)
- [init(rows:)](simd/simd_double4x4/init(rows:).md)