--- Begin Message ---
- From: "Peng-Sheng Chen" <pschen at pllab dot cs dot nthu dot edu dot tw>
- To: "'Brian Gough'" <bjg at network-theory dot co dot uk>
- Date: Wed, 22 May 2002 21:28:57 +0800
- Subject: RE: FW: GSL support "left division \ " ?
Hello, Brian:
Thanks your reply for my previous question.
If I want to get all solutions (not only one solution), how
to do it ?
(some equations exist many solutions.)
Thanks very much.
Ps. Chen
> -----Original Message-----
> From: Brian Gough [mailto:bjg@network-theory.co.uk]
> Sent: Wednesday, May 08, 2002 5:23 AM
> To: Peng-Sheng Chen
> Cc: gsl-discuss@sources.redhat.com
> Subject: Re: FW: GSL support "left division \ " ?
>
> Peng-Sheng Chen writes:
> > Hello: There is an equation: Ax = B. A is m-by-n matrix.
> > x is n vector. B is m vector. The condition is m >= n,
> > that is we have equations more than unknown variable. In
> > matlab, it support a operator “left divide \ ” to manipulate
> > the equations. In GSL, how to compute x ? (multidimention
> > root-finding?) Thanks very much.
>
> For overdetermined systems you can find the least-squares solution
> using gsl_linalg_QR_lssolve or gsl_linalg_SV_solve, described in the
> "Linear Algebra" chapter of the manual.
>
> regards
> Brian Gough
>
--- End Message ---