---
title: "simd_make_half3_undef(_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/simd_make_half3_undef(_:)-6lcqp"
---

# simd_make_half3_undef(_:)

Returns a new vector with the first element set to a scalar value, and other elements undefined.

## Declaration

```swift
func simd_make_half3_undef(_ other: Float16) -> simd_half3
```

## See Also

### Functions to create three-element vectors from scalar values

- [simd_make_half3(_:)](simd/simd_make_half3(_:)-9gqvo.md)
- [simd_make_half3(_:_:_:)](simd/simd_make_half3(_:_:_:).md)
- [simd_make_half3(_:_:)](simd/simd_make_half3(_:_:)-5wwpl.md)
- [simd_make_half3(_:_:)](simd/simd_make_half3(_:_:)-4svq0.md)