2. EL 7
  3. lapack
  4. DZSUM1(3)

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dzsum1.f(3) LAPACK dzsum1.f(3)

NAME

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 (integerN, complex*16, dimension( * )CX, integerINCX)

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.

Date:

September 2012

Contributors:

Nick Higham for use with ZLACON.

Definition at line 82 of file dzsum1.f.

Author

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Tue Sep 25 2012 Version 3.4.2