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SRC/lapack_64_obj/dzsum1.f(3) Library Functions Manual SRC/lapack_64_obj/dzsum1.f(3)

NAME

SRC/lapack_64_obj/dzsum1.f

SYNOPSIS

Functions/Subroutines


double precision function DZSUM1 (n, cx, incx)
DZSUM1 forms the 1-norm of the complex vector using the true absolute value.

Function/Subroutine Documentation

double precision function DZSUM1 (integer n, complex*16, dimension( * ) cx, integer incx)

DZSUM1 forms the 1-norm of the complex vector using the true absolute value.

Purpose:

!>
!> DZSUM1 takes the sum of the absolute values of a complex
!> vector and returns a double precision result.
!>
!> Based on DZASUM from the Level 1 BLAS.
!> The change is to use the 'genuine' absolute value.
!>

Parameters

N 

!>          N is INTEGER
!>          The number of elements in the vector CX.
!>

CX

!>          CX is COMPLEX*16 array, dimension (N)
!>          The vector whose elements will be summed.
!>

INCX

!>          INCX is INTEGER
!>          The spacing between successive values of CX.  INCX > 0.
!>

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Contributors:

Nick Higham for use with ZLACON.

Definition at line 81 of file dzsum1.f.

Author

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Version 3.12.1 LAPACK