Function ddot_subrow (o2scl_cblas)

O2scl : Function List

template<class mat_t, class vec_t>
double o2scl_cblas::ddot_subrow(const size_t N, const mat_t &X, const size_t ir, const size_t ic, const vec_t &Y)

Compute \( r=x \cdot y \) for a subrow of a matrix.

Given the matrix X, define the vector x as the row with index ir. This function computes \( r=x \cdot y \) for elements in the vectors x from column ic to column (inclusive). All other elements in x and y are not referenced.

If ic is greater than N-1 then the error handler will be called if O2SCL_NO_RANGE_CHECK is not defined.

Used in householder_hv_sub().