I'm forwarding a question from Timmy to the list. See below cheers sven -------- Weitergeleitete Nachricht -------- Betreff: Orthonormal and orthogonal Datum: Thu, 14 Mar 2019 16:13:33 +0100 Von: Olasehinde Timmy <timmexdareal(a)gmail.com&gt; An: Sven Schreiber <svetosch(a)gmx.net&gt; Dear Prof, I should have sent you this message via the gretl mailing list, but it seems there is a technical problem with the server. I would be glad if you can show me how to compute orthonormal and orthogonal of a matrix in gretl. For example, if alpha matrix is α = {-0.2,-0.3;0.1,-0.4}. Thanks for your help. Regards Timmy.