snrm2
snrm2 - Return the Euclidian norm of a vector.
REAL FUNCTION SNRM2( N, X, INCX)
INTEGER N, INCX
REAL X(*)
REAL FUNCTION SNRM2_64( N, X, INCX)
INTEGER*8 N, INCX
REAL X(*)
REAL FUNCTION NRM2( [N], X, [INCX])
INTEGER :: N, INCX
REAL, DIMENSION(:) :: X
REAL FUNCTION NRM2_64( [N], X, [INCX])
INTEGER(8) :: N, INCX
REAL, DIMENSION(:) :: X
#include <sunperf.h>
float snrm2(int n, float *x, int incx);
float snrm2_64(long n, float *x, long incx);
snrm2 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 subroutine to have any visible effect. Unchanged on exit.
-
* X (input)
-
( 1 + ( m - 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 be positive.
Unchanged on exit.