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Re: [Help-gsl] Linear System Solve

From: Dimitris K.
Subject: Re: [Help-gsl] Linear System Solve
Date: Tue, 24 Apr 2012 18:19:25 +0300

Great! gsl_linalg_QR_lssolve has worked without errors, now to test the

Thank you very much!

On Tue, Apr 24, 2012 at 6:15 PM, Rhys Ulerich <address@hidden>wrote:

> >> > Suppose we have A of size 9x2 and b of size 9x1
> >> > How would I solve Ax = b for x using GSL? Which method to use?
> >> Probably gsl_linalg_QR_lssolve.  You can read up on the QR routines at
> >>
> > That's what I'm looking into and although it seems I've supposedly
> followed
> > the correct steps, it still complains:
> >
> > gsl: qr.c:112: ERROR: QR matrix must be square
> qr.c:112 is within the routine gsl_linalg_QR_solve and not the routine
> gsl_linalg_QR_lssolve.  I expect the former to complain about
> nonsquare matrices.  Try calling the latter.
> - Rhys


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