On Mon, Oct 28, 2013 at 3:00 PM, Jed Brown <[email protected]> wrote:
> Christophe Ortiz <[email protected]> writes: > > But just to understand what I'm doing, what does TSSetEquationType do > > internally ? > > It tells the method what is necessary to evaluate stage derivatives, and > affects the starting method and (possibly) what can be carried over from > the last step. > > Ok, I understand. For the moment it works well with this option. I'm still doing some tests and I would like to know if it's possible to view a solution in log scale ? To view the solution after diffusion I use ierr = PetscViewerDrawOpen(PETSC_COMM_WORLD,NULL,"",0,0,300,300,&viewer); VecView(X,viewer); Since the values of X are large (~1e20) and vary logarithmically, I would like to view them in log scale. How can I do that ? Also, is it possible to view the "real coordinates" in x-axis, instead of the node number ? Christophe > > For the type of problem I'm trying to solve, is TS_EQ_DAE_IMPLICIT_INDEX1 > > ok ? > > Yes. > > > What is the difference with TS_EQ_DAE_IMPLICIT_INDEX2,3 or _INDEXHI ? > > I believe these are currently unused, but if we add support for > computing consistent initial conditions, we'll have to know the index. >
