Math Vector Library
Programming Reference Manual C/C++
Version 1.0 DD-00002-010

12.1 vcreal - Vector complex real compoment Re(x)

#include <mvec.h>

void vcreal (int n, double *y, int incy, const double complex *x, int incx);
void vcrealf(int n, float *y, int incy, const float complex *x, int incx);

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

y= Re(x)

Where x∈ C  and y∈ R  .

12.1.1 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: incy> 0  .

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: incx> 0  .