# Fast QR Decomposition and Update

## Documentation for package ‘fastQR’ version 1.0.0

- DESCRIPTION file.

## Help Pages

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