qr.cpp File Reference

QR dispatcher + qr_solve. More...

#include "linalg/factorization/qr.hpp"
#include "backends/seq/impl.hpp"
#include "backends/lapack/impl.hpp"

Go to the source code of this file.

Namespaces
namespace	num

Functions
QRResult	num::qr (const Matrix &A, Backend backend=lapack_backend)
	QR factorization of an mxn matrix A (m >= n) via Householder reflections.
void	num::qr_solve (const QRResult &f, const Vector &b, Vector &x)
	Solve the least-squares problem min ||A*x - b||_2.

Detailed Description

QR dispatcher + qr_solve.

Backend routing: Backend::lapack -> backends::lapack::qr (dgeqrf + dorgqr, blocked BLAS-3) everything else -> backends::seq::qr (Householder reflections)

Definition in file qr.cpp.