dzsum1.f - Man Page

double precision function dzsum1 (n, cx, incx)
DZSUM1 forms the 1-norm of the complex vector using the true absolute value.

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 80 of file dzsum1.f.