qr                      The QR factorization of a matrix
qrchol                  Cholesky decomposition via QR factorization.
qrdowndate              Fast downdating of the QR factorization
qrls                    Ordinary least squares for the linear
                        regression model
qrmls                   Ordinary least squares for the linear
                        multivariate regression model
qrmridge                RIDGE estimator for the linear multivariate
                        regression model
qrmridge_cv             Cross-validation of the RIDGE estimator for the
                        linear multivariate regression model
qrridge                 RIDGE estimation for the linear regression
                        model
qrridge_cv              Cross-validation of the RIDGE estimator for the
                        linear regression model
qrsolve                 Solution of linear system of equations, via the
                        QR decomposition.
qrupdate                Fast updating of the QR factorization
rchol                   Cholesky decomposition via R factorization.
rdowndate               Fast downdating of the R matrix
rupdate                 Fast updating of the R matrix
