R help - Oct 2008 - Reconstruct the Q matrix from the QR object

Hi,

Is it possible to construct a Q from qr() that some of the rows could
be specified (to be fixed values)?

Thanks,
cruz

x <- matrix(rnorm(1:20), 5, 4)
x.qr <- qr(x)

Q <- qr.Q(x.qr)
R <- qr.R(x.qr)
X <- qr.X(x.qr)

Q
R
X
Q %*% R

qr.Q(x.qr, complete=TRUE)  ## orthogonal completion