vcabs - Vector complex absolute value |x|

16.3 vcabs - Vector complex absolute value $|x|$

#include <mvec.h> 
 
void vcabs (int n, double *restrict y, int incy, const double complex *restrict x, int incx); 
void vcabsf(int n, float *restrict y, int incy, const float complex *restrict x, int incx); 
 
void vcabs_64 (long n, double *restrict y, long incy, const double complex *restrict x, long incx); 
void vcabsf_64(long n, float *restrict y, long incy, const float complex *restrict x, long incx);

Given a complex input vector $x$ and a result vector $y$ , this function computes:

y= |x |

Where $x∈ C$ and $y∈ R$ .

16.3.1 Parameters

N - INTEGER: ENTRY: Number of elements of $x$ and $y$ .
CONSTRAINT: $n ≥1$ .
Y - ARRAY OF REAL: EXIT: Result vector $y$ .
CONSTRAINT: Must contain $n× incy$ elements.
CONSTRAINT: Must not overlap with array $x$ .
INCY - INTEGER: ENTRY: Stride for the vector $y$ .
CONSTRAINT: $incy̸= 0$ .
BEHAVIOR: A negative stride will traverse the array in reverse.
X - ARRAY OF COMPLEX: ENTRY: Input vector $x$ .
CONSTRAINT: Must contain $n× incx$ elements.
CONSTRAINT: Must not overlap with array $y$ .
INCX - INTEGER: ENTRY: Stride for the vector $x$ .
CONSTRAINT: $incx̸= 0$ .
BEHAVIOR: A negative stride will traverse the array in reverse.

[next] [prev] [prev-tail] [front] [up]