DZSUM1 (3) Linux Manual Page

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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