Interface QROptions

Use LAPACK-style full column pivoting (R's LAPACK = TRUE). The rank is then always min(nrow, ncol) and is not detected. Default: false (R's LINPACK-style limited pivoting with tol).

Tolerance for detecting linear dependence: a column whose remaining norm falls below tol times its original norm is moved to the right end and reduces the rank. Default: 1e-7. Used only when lapack is false.