Contents

• NAME
• SYNOPSIS
  • F95 INTERFACE
  • C INTERFACE
• PURPOSE
• ARGUMENTS

NAME

     dzasum - Return the sum of the absolute values of  a  vector
     x.

SYNOPSIS

     DOUBLE PRECISION FUNCTION DZASUM(N, X, INCX)

     DOUBLE COMPLEX X(*)
     INTEGER N, INCX

     DOUBLE PRECISION FUNCTION DZASUM_64(N, X, INCX)

     DOUBLE COMPLEX X(*)
     INTEGER*8 N, INCX

  F95 INTERFACE
     REAL(8) FUNCTION ASUM([N], X, [INCX])

     COMPLEX(8), DIMENSION(:) :: X
     INTEGER :: N, INCX

     REAL(8) FUNCTION ASUM_64([N], X, [INCX])

     COMPLEX(8), DIMENSION(:) :: X
     INTEGER(8) :: N, INCX

  C INTERFACE
     #include <sunperf.h>

     double dzasum(int n, doublecomplex *x, int incx);

     double dzasum_64(long n, doublecomplex *x, long incx);

PURPOSE

     dzasum Return the sum of the absolute values of the elements
     of  x  where x is an n-vector.  This is the sum of the abso-
     lute values of the real and complex elements and not the sum
     of the squares of the real and complex elements.

ARGUMENTS

     N (input)
               On entry, N specifies the number  of  elements  in
               the  vector.   N must be at least one for the sub-
               routine to have any visible effect.  Unchanged  on
               exit.

     X (input)
               ( 1 + ( n - 1 )*abs( INCX  )  ).   On  entry,  the
               incremented  array  X  must  contain the vector x.
               Unchanged on exit.

     INCX (input)
               On entry, INCX specifies  the  increment  for  the
               elements  of  X. INCX must not be zero.  Unchanged
               on exit.