---
title: "rootMeanSquare(_:)"
framework: accelerate
role: symbol
role_heading: Type Method
path: "accelerate/vdsp/rootmeansquare(_:)-9xkkk"
---

# rootMeanSquare(_:)

Returns the root mean square of a single-precision vector.

## Declaration

```swift
static func rootMeanSquare<U>(_ vector: U) -> Float where U : AccelerateBuffer, U.Element == Float
```

## Parameters

- `vector`: The source vector.

## Discussion

Discussion This function calculates and returns the root mean square of a supplied vector. The following is an example of using rootMeanSquare(_:):     let a: [Float] =  [-8, -4, -2, 0, 2, 4, 8]

let rms = vDSP.rootMeanSquare(a)          print(rms) // Prints "4.89".

## See Also

### Type Methods

- [absolute(_:)](accelerate/vdsp/absolute(_:)-9c3ge.md)
- [absolute(_:)](accelerate/vdsp/absolute(_:)-5ehc1.md)
- [absolute(_:result:)](accelerate/vdsp/absolute(_:result:)-9x5jn.md)
- [absolute(_:result:)](accelerate/vdsp/absolute(_:result:)-1wu9x.md)
- [absolute(_:result:)](accelerate/vdsp/absolute(_:result:)-657bd.md)
- [absolute(_:result:)](accelerate/vdsp/absolute(_:result:)-4pigo.md)
- [add(_:_:)](accelerate/vdsp/add(_:_:)-9mv1a.md)
- [add(_:_:)](accelerate/vdsp/add(_:_:)-2ftxc.md)
- [add(_:_:)](accelerate/vdsp/add(_:_:)-53nh9.md)
- [add(_:_:)](accelerate/vdsp/add(_:_:)-7swvf.md)
- [add(_:_:result:)](accelerate/vdsp/add(_:_:result:)-2531u.md)
- [add(_:_:result:)](accelerate/vdsp/add(_:_:result:)-2w0o9.md)
- [add(_:_:result:)](accelerate/vdsp/add(_:_:result:)-338hl.md)
- [add(_:_:result:)](accelerate/vdsp/add(_:_:result:)-3vzwi.md)
- [add(_:to:count:result:)](accelerate/vdsp/add(_:to:count:result:)-g1dk.md)