rimtrf: Upper triangularization (QR-decomposition) of the design
matrix and determination of its pseudorank
Description
See Marazzi A. (1993), p.64Usage
rimtrf(x, n = nrow(x), intch = .dFvGet()$ith, tau = .dFvGet()$tua)
References
Marazzi A. (1993) Algorithm, Routines, and S functions
for Robust Statistics. Wadsworth & Brooks/cole, Pacific Grove,
California. p.64