Function

vDSP_zrvdiv(_:_:_:_:_:_:_:)

Divides a single-precision complex vector by a single-precision real vector.

Declaration

func vDSP_zrvdiv(_ __A: UnsafePointer<DSPSplitComplex>, _ __IA: vDSP_Stride, _ __B: UnsafePointer<Float>, _ __IB: vDSP_Stride, _ __C: UnsafePointer<DSPSplitComplex>, _ __IC: vDSP_Stride, _ __N: vDSP_Length)

Parameters

__A

Single-precision complex input vector.

__IA

Stride for A.

__B

Single-precision real input vector.

__IB

Stride for B.

__C

Single-precision complex output vector.

__IC

Stride for C.

__N

The number of elements to process.

Discussion

This function divides of the first N complex elements of A by the corresponding real elements of B, writing the result to C:

A diagram showing the operation of the vDSP_zrvdiv function. There are three rows. The top row represents the first input, vector A. The second row represents the second input, vector B. The bottom row represents the output, vector C. The diagram has connecting lines from the input vectors to the output vector indicating the relationships between the inputs and output.

The operation is:

 for (n = 0; n < N; ++n)
    C[n] = A[n] / B[n];

The following code shows an example of using vDSP_zrvdiv(_:_:_:_:_:_:_:):

let n = vDSP_Length(4)
let stride = vDSP_Stride(1)

var realA: [Float] = [15, 30, 45, 60]
var imagA: [Float] = [30, 60, 90, 120]
var a = [DSPSplitComplex(realp: &realA,
                         imagp: &imagA)]

var b: [Float] = [1, 2, 3, 4]

var realC = [Float](repeating: .nan, count: Int(n))
var imagC = [Float](repeating: .nan, count: Int(n))
var c = DSPSplitComplex(realp: &realC,
                        imagp: &imagC)

vDSP_zrvdiv(&a, stride,
            &b, stride,
            &c, stride,
            n)

print("real", realC) // Prints "real [15.0. 15.0, 15.0, 15.0]"
print("imag", imagC) // Prints "imag [30.0, 30.0, 30.0, 30.0]"

See Also

Binary (Complex-Real) Division Operations

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