Christophe Ortiz <[email protected]> writes: > 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 ?
You can use VecLog() and plot that. > Also, is it possible to view the "real coordinates" in x-axis, instead of > the node number ? Use DMDASetUniformCoordinates() or similar.
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