NORM2— Euclidean vector norms ¶
Calculates the Euclidean vector norm (L_2 norm) of ARRAY along dimension DIM.
Fortran 2008 and later
|ARRAY||Shall be an array of type |
|DIM||(Optional) shall be a scalar of type
The result is of the same type as ARRAY.
If DIM is absent, a scalar with the square root of the sum of all elements in ARRAY squared is returned. Otherwise, an array of rank n-1, where n equals the rank of ARRAY, and a shape similar to that of ARRAY with dimension DIM dropped is returned.
PROGRAM test_sum REAL :: x(5) = [ real :: 1, 2, 3, 4, 5 ] print *, NORM2(x) ! = sqrt(55.) ~ 7.416 END PROGRAM