dolfin team mailing list archive

[Anders Logg <logg@xxxxxxxxx>]

On Mon, May 21, 2007 at 02:47:45PM +0200, Ola Skavhaug wrote:
> Anders Logg skrev den 18/05-2007 følgende:
> > Can something be done about choosing a reasonable scaling for arrows
> > in vector plots? How about setting the maximum length to something
> > like
> > 
> >     D / num_vertices^(1/d)
> > 
> > where D is the diameter of the domain, and d is the space dimension?
> > 
> > Take a look as the DOLFIN demo in src/demo/pde/mixed-poisson and you
> > will see what I mean... :-)
> 
> The test doesn't run:
>   Using direct solver.
>   *** Warning: UMFPACK must be installed to peform a LU solve for uBlas
> matrices. A Krylov iterative solver will be used instead.
>   Solving linear system of size 2112 x 2112 (uBlas Krylov solver).
> terminate called after throwing an instance of 'std::runtime_error'
>   what():  *** Error: Zero pivot detected in uBlas ILU preconditioner in row
> 1600.
> Aborted (core dumped)
> 
> I have libufsparse (and dev package) installed, and I need these because of
> octave2.9. libumfpack conflicts with libufsparse. What is the solution?
> 
> Ola

I don't have a good solution to the libufsparse/libumfpack problem.
Anyone else?

I've attached the solution (sigma.xml.gz). Let's see if it goes
through or it's too large for the mailing list (21K).

/Anders