
Ublas : 
From: Sohail Somani (s.somani_at_[hidden])
Date: 20060413 14:41:58
Warning: I think the wiki says that this code will crash on a singular
matrix.
Just fyi.
> Original Message
> From: ublasbounces_at_[hidden]
> [mailto:ublasbounces_at_[hidden]] On Behalf Of Manoj Rajagopalan
> Sent: Thursday, April 13, 2006 7:06 AM
> To: ublas mailing list
> Subject: Re: [ublas] Solving linear equations of the form Ax = b ?
>
> you can solve Ax=b using three lines of ublas code:
>
> permutation_matrix<> piv;
> lu_factorize(A, piv);
> lu_substitute(A, piv, x);
>
> Then x will contain the solution and A is overwritten with its LU
> decomposition. i.e., the original values of A and x are
> destroyed so the
> above lines are actually the inplace_solve(A, x) for a dense,
> generic A.
>
> BTW, I've come across this in many places  what does
> "boilerplate code"
> mean and why is it called so?
>
> cheers!
> Manoj
>
>
>
> John Maddock wrote:
> > I gather from a quick web search that ublas does have LUP
> decomposition
> > routines, however a grep of the docs failed to find any
> mention of the
> > routine in question, and how they should be used.
> >
> > So.... does anyone have the boiler plate code needed to
> solve for x given
> > matrix A and vector b ?
> >
> > Many thanks,
> >
> > John Maddock.
> >
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