[petsc-dev] MatMFFDSetType

[Barry Smith]

  I have added MatFDColoringSetType() in the branch barry/add-missing-apis/maint and merged the branch into next for testing. If it builds and runs everywhere I will put it into the maint branch (and master) and it will be in the next patch release.

   Barry

> On Jun 26, 2016, at 8:49 PM, Adrian Croucher <a.croucher at auckland.ac.nz> wrote:
> 
> 
> 
> On 27/06/16 13:44, Barry Smith wrote:
>> Yes, you are correct, there is no MatFDSetType() and in the SetFromOptions we totally cheat http://www.mcs.anl.gov/petsc/petsc-current/src/mat/matfd/fdmatrix.c.html#MatFDColoringSetFromOptions and just stick the value directly into the data structure. For now you can call
>> PetscOptionsSetValue(NULL,"-mat_fd_type","ds") in your code (before you start using the MatFD stuff) and we'll add the routine to the master branch.
> 
> Thanks, that workaround does the trick for now.
>> I didn't think anyone would care about the difference between ds and wp with MatFD.
> It makes a noticeable difference for the problem I'm solving right now. That may be because the problem is not non-dimensionalized (as yet anyway) and so some of the solution elements are of different magnitudes than others. If I non-dimensionalize them it may possibly not matter any more about wp or ds.
> 
> - Adrian
> -- 
> Dr Adrian Croucher
> Senior Research Fellow
> Department of Engineering Science
> University of Auckland, New Zealand
> email: 
> a.croucher at auckland.ac.nz
> 
> tel: +64 (0)9 923 84611
>