Function daxpy_subcol (o2scl_cblas)

O2scl : Function List

template<class mat_t, class vec_t>
void o2scl_cblas::daxpy_subcol(const double alpha, const size_t M, const mat_t &X, const size_t ir, const size_t ic, vec_t &y)

Compute \( y=\alpha x+y \) for a subcolumn of a matrix.

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

Used in householder_hv_sub().