absolute(_:result:)
Calculates the absolute value of each element in the supplied double-precision vector.
Declaration
static func absolute<U, V>(_ vector: U, result: inout V) where U : AccelerateBuffer, V : AccelerateMutableBuffer, U.Element == Double, V.Element == DoubleParameters
- vector:
The source vector.
- result:
On output, the absolute values of the elements in the source vector.
Discussion
For example, the following code calculates the absolute values of the elements of an array:
let values: [Double] = [-1, 2, -3, 4, -5, 6, -7, 8]
let absoluteValues = [Double](unsafeUninitializedCapacity: values.count) {
buffer, initializedCount in
vDSP.absolute(values, result: &buffer)
initializedCount = values.count
}
// Prints "[1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0]".
print(absoluteValues)