# taperedMerge(_:_:result:) Computes the result of a tapered merge between two double-precision vectors. ``` static func taperedMerge(_ vectorA: T, _ vectorB: U, result: inout V) where T : AccelerateBuffer, U : AccelerateBuffer, V : AccelerateMutableBuffer, T.Element == Double, U.Element == Double, V.Element == Double ``` ## Parameters `vectorA` The first vector to merge. `vectorB` The second vector to merge. `result` The destination vector that receives the result. ## Discussion The following code performs a tapered merge between two vectors that represent sine waves at different frequencies: ```swift let count = 1024 let vectorA: [Double] = (0 ..< count).map { return sin(Float($0) * 0.4) } let vectorB: [Double] = (0 ..< count).map { return sin(Float($0) * 0.025) } let tapered = [Double](unsafeUninitializedCapacity: count) { buffer, initializedCount in vDSP.taperedMerge(vectorA, vectorB, result: &buffer) initializedCount = count } ``` The following image shows the result of the tapered merge in `tapered`.  --- 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)