Function dnrm2 (o2scl_cblas)

O2scl : Function List

template<class vec_t>
double o2scl_cblas::dnrm2(const size_t N, const vec_t &X)

Compute the norm of the vector X.

If N is less than or equal to zero, this function returns zero without calling the error handler.

This function works only with vectors which hold double. For the norm of a general floating point vector, see vector_norm().

Note

The suffix “2” on the function name indicates that this computes the “2-norm”, not that the norm is squared.