non-economic QR decomposition

[neodreamer]

how to do the non-economic QR decompostion for non-square matrix
using lapack?
for example, in matlab, for a mxn full rank matrix where m>n
[Q,R] = qr(A) gives a mxm unitary matrix Q and mxn upper-triangular
matrix R. But xgeqrf returns mxn matrix Q and nxn upper-triangular matrix.
In matlab, they call this result the economic QR decomposition

[sven]

Please see the discussion "Full Q out of QR" at:

https://icl.cs.utk.edu/lapack-forum/viewtopic.php?t=326

Best wishes,

Sven Hammarling.