vDSP_svs
Calculates the sum of signed squares in a single-precision vector.
Declaration
extern void vDSP_svs(const float *__A, vDSP_Stride __IA, float *__C, vDSP_Length __N);Parameters
- __A:
Single-precision real input vector.
- __IA:
Stride for
A. - __C:
Single-precision real output scalar.
- __N:
The number of elements to process.
Discussion
This function calculates the sum of the signed squares of the first N elements of A and writes the result to C:
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The operation is:
C[0] = sum(A[n] * |A[n]|, 0 <= n < N);The following code shows an example of using vDSP_svs: