dolfin team mailing list archive

[Shawn Walker <walker@xxxxxxxxxxxxxxx>]

What?  This seems ridiculous.  I know there are routines to extract a 
block of values from a matrix.  But I need to have some kind of pointer to 
the matrix.  I don't know how to get this.

- Shawn

On Mon, 22 Jun 2009, Jed Brown wrote:

> Shawn Walker wrote:
> > Sure.  I just need to be able to compute the difference between the
> > entries of two matrices.  Is there a demo for this?
>
> It's a PETSc thing, be sure to call dolfin_init(argc,argv) at the top of
> main.  Depending on where the other matrix comes from, there are many
> ways to do this, but I assume you will be working with very small
> matrices so you either want to put them in Matlab/Octave or just eyeball
> them.
>
> Jed