Computes absolute value of complex number.
Syntax
FORTRAN 77:
res = scabs1(z)
res = dcabs1(z)
Fortran 95:
res = cabs1(z)
Include Files
The FORTRAN 77 interfaces are specified in the mkl_blas.fi include file, the Fortran 95 interfaces are specified in the blas.f90 include file, and the C interfaces are specified in the mkl_blas.h include file.
Description
The ?cabs1 is an auxiliary routine for a few BLAS Level 1 routines. This routine performs an operation defined as res=|Re(z)|+|Im(z)|,
where z is a scalar, and res is a value containing the absolute value of a complex number z.
Input Parameters
- z
COMPLEX scalar for scabs1.
DOUBLE COMPLEX scalar for dcabs1.
Output Parameters
- res
REAL for scabs1.
DOUBLE PRECISION for dcabs1.
Contains the absolute value of a complex number z.