Computes absolute value of complex number.

Syntax

res = scabs1(z)

res = dcabs1(z)

res = cabs1(z)

Include Files

  • mkl.fi, blas.f90

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.

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