# meanSquare(_:) Returns the mean of squares of a single-precision vector. ``` static func meanSquare(_ vector: U) -> Float where U : AccelerateBuffer, U.Element == Float ``` ## Parameters `vector` The source vector. ## Discussion This function calculates and returns the mean square of a supplied vector. The following is an example of using [`meanSquare(_:)`](/documentation/Accelerate/vDSP/meanSquare(_:)-751e5): ```swift let a: [Float] = [-8, -4, -2, 0, 2, 4, 8] let mean = vDSP.meanSquare(a) print(mean) // Prints "24.0". ``` --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)