Contents

add(multiplication:multiplication:)

Returns the single-precision element-wise addition of two vector-scalar products.

Declaration

static func add<T, U>(multiplication multiplicationAB: (a: T, b: Float), multiplication multiplicationCD: (c: U, d: Float)) -> [Float] where T : AccelerateBuffer, U : AccelerateBuffer, T.Element == Float, U.Element == Float

Parameters

  • multiplicationAB:

    A tuple that contains the vector A and the scalar value B in E = (A * B) + (C * D).

  • multiplicationCD:

    A tuple that contains the vector C and the scalar value D in E = (A * B) + (C * D).

Mentioned in

Return Value

The output vector E in E = (A * B) + (C * D).

Discussion

This function calculates the element-wise vector-scalar products of A and B, and C and D, and writes the sum of the products to vector D.

for (n = 0; n < N; ++n)
    E[n] = A[n]*B + C[n]*D;

[Image]

The following code shows an example of using this function:

    let a: [Float] = [ 1,  2,  3,  4,  5]
    let b: Float = 10
    let c: [Float] = [ 5,  4,  3,  2,  1]
    let d: Float = 50
    
    let e = vDSP.add(multiplication: (a, b),
                     multiplication: (c, d))
    
    // Prints "[260.0, 220.0, 180.0, 140.0, 100.0]".
    print(e)

See Also

Addition