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