Contents
dznrm2 - Return the Euclidian norm of a vector.
DOUBLE PRECISION FUNCTION DZNRM2(N, X, INCX)
DOUBLE COMPLEX X(*)
INTEGER N, INCX
DOUBLE PRECISION FUNCTION DZNRM2_64(N, X, INCX)
DOUBLE COMPLEX X(*)
INTEGER*8 N, INCX
F95 INTERFACE
REAL(8) FUNCTION NRM2([N], X, [INCX])
COMPLEX(8), DIMENSION(:) :: X
INTEGER :: N, INCX
REAL(8) FUNCTION NRM2_64([N], X, [INCX])
COMPLEX(8), DIMENSION(:) :: X
INTEGER(8) :: N, INCX
C INTERFACE
#include <sunperf.h>
double dznrm2(int n, doublecomplex *x, int incx);
double dznrm2_64(long n, doublecomplex *x, long incx);
dznrm2 Return the Euclidian norm of a vector x where x is an
n-vector.
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. If INCX < 1 then DZNRM2 returns 0.
Unchanged on exit.