On 14-Jul-1997, Moritz Harteneck <

[hidden email]> wrote:

| I am trying to make a QR decomposition of a fairly large matrix

| (ca. 1584x252 real elements). However, I am not interested in the

| rotation matrix q and I want to avoid it due to memory reasons. Does

| anybody know how to do this?

With Octave 2.0.9, you can get R by running qr(x) and asking for only

one output:

octave:1> help qr

qr is a builtin function

...

qr (X) alone returns the output of the LAPACK routine dgeqrf, such

that R = triu (qr (X))

jwe