---
title: "simd_make_float4_undef(_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/simd_make_float4_undef(_:)-3brs5"
---

# simd_make_float4_undef(_:)

Returns a new vector from the specified two-element vector, and other elements undefined.

## Declaration

```swift
func simd_make_float4_undef(_ other: simd_float2) -> simd_float4
```

## See Also

### Functions to Create Four-Element Vectors From Other Vectors

- [simd_make_float4(_:)](simd/simd_make_float4(_:)-iuxp.md)
- [simd_make_float4(_:)](simd/simd_make_float4(_:)-fyse.md)
- [simd_make_float4(_:)](simd/simd_make_float4(_:)-cjxn.md)
- [simd_make_float4(_:)](simd/simd_make_float4(_:)-9xll2.md)
- [simd_make_float4(_:)](simd/simd_make_float4(_:)-5sesp.md)
- [simd_make_float4(_:_:)](simd/simd_make_float4(_:_:)-51w3j.md)
- [simd_make_float4_undef(_:)](simd/simd_make_float4_undef(_:)-3f7tu.md)