NAME

dnrm2 - Return the Euclidian norm of a vector. 

SYNOPSIS

DOUBLE PRECISION FUNCTION DNRM2 (N, X, INCX)

double dnrm2(long int n, double ∗dx, long int incx)

INTEGER INCX, N

DOUBLE PRECISION    X( ∗ )

PURPOSE

DNRM2 - Return the Euclidian norm of a vector x where x is an n-vector. 
 

PARAMETERS

N      - INTEGER. 
On entry, N specifies the number of elements in the vector.  N must be at least one for the subroutine to have any visible effect.  Unchanged on exit.

X      - DOUBLE PRECISION array of DIMENSION at least
( 1 + ( m - 1 )∗abs( INCX ) ). On entry, the incremented array X must contain the vector x.  Unchanged on exit.

INCX   - INTEGER. 
On entry, INCX specifies the increment for the elements of X.  INCX must be positive. Unchanged on exit.

Sun, Inc.  —  Last change: 20 Sep 1996