> Try UPM Octave Version 7 by F. Herraiz.
Is there an English version?
________________________________
From: Wolfgang Lindner <LindnerW at t-online.de>
To: Ether Jones <maxima at etherjones.us>
Sent: Sunday, March 10, 2013 2:59 AM
Subject: Re: [Maxima] QR factorization & backsubstitution
| I'm familiar with Octave but have been waiting for a stable native binary
distro for Windows.
| Is there one you recommend?
Try UPM Octave Version 7 by F. Herraiz.
Wolfgang
________________________________
From: Przemek Klosowski <przemek.klosowski at nist.gov>
To: Ether Jones <maxima at etherjones.us>
Sent: Friday, March 8, 2013 11:19 AM
Subject: Re: [Maxima] QR factorization & backsubstitution
On 03/07/2013 08:01 PM, Ether Jones wrote:
> Does Maxima have QR factorization built in?
>
> i.e. A = Q*R
>
> where A has more rows than columns, Q is orthogonal, and R is upper
> triangular?
>
> Also, does Maxima have a backsubstitution method, so that
> the overdetermined linear system Ax~b can be solved using QR
> factorization by solving Rx=Q'b by backsubstitution?
Since you're asking for a numerical solution, I would recommend using a
numerics-oriented package such as Octave, which indeed has QR and
backsubstitution. I am pretty sure that Maxima can get access to the same
functionality (it's LAPACK after all) but you may need some extra work to
get to it while it's bread and butter to Octave which is a FOSS Matlab clone
in case you're not familiar with it.