# absolute(_:) Returns the absolute value of each element in the supplied double-precision vector. ``` static func absolute(_ vector: U) -> [Double] where U : AccelerateBuffer, U.Element == Double ``` ## Parameters `vector` The source vector. ## Discussion For example, the following code calculates the absolute values of the elements of an array: ```swift let values: [Double] = [-1, 2, -3, 4, -5, 6, -7, 8] let absoluteValues = vDSP.absolute(values) // Prints "[1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0]". print(absoluteValues) ``` --- 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)