[petsc-users] MatColoring

[Mark Adams]

This should do it:

https://petsc.org/release/docs/manualpages/MatOrderings/MatColoringSetType.html#MatColoringSetType

Also, this page has MATCOLORINGMIS, but that is not a type:

typedef const  char*           MatColoringType
<https://petsc.org/release/docs/manualpages/Mat/MatColoringType.html#MatColoringType>;
#define MATCOLORINGJP
<https://petsc.org/release/docs/manualpages/MatOrderings/MATCOLORINGJP.html#MATCOLORINGJP>
     "jp"
#define MATCOLORINGPOWER
<https://petsc.org/release/docs/manualpages/MatOrderings/MATCOLORINGPOWER.html#MATCOLORINGPOWER>
  "power"
#define MATCOLORINGNATURAL
<https://petsc.org/release/docs/manualpages/MatOrderings/MATCOLORINGNATURAL.html#MATCOLORINGNATURAL>
"natural"
#define MATCOLORINGSL
<https://petsc.org/release/docs/manualpages/MatOrderings/MATCOLORINGSL.html#MATCOLORINGSL>
     "sl"
#define MATCOLORINGLF
<https://petsc.org/release/docs/manualpages/MatOrderings/MATCOLORINGLF.html#MATCOLORINGLF>
     "lf"
#define MATCOLORINGID
<https://petsc.org/release/docs/manualpages/MatOrderings/MATCOLORINGID.html#MATCOLORINGID>
     "id"
#define MATCOLORINGGREEDY
<https://petsc.org/release/docs/manualpages/MatOrderings/MATCOLORINGGREEDY.html#MATCOLORINGGREEDY>
 "greedy"


I guess they mean MATCOLORINGGREEDY
<https://petsc.org/release/docs/manualpages/MatOrderings/MATCOLORINGGREEDY.html#MATCOLORINGGREEDY>
but
not sure.

Mark


On Tue, May 10, 2022 at 11:40 AM Jorti, Zakariae via petsc-users <
petsc-users at mcs.anl.gov> wrote:

> Hi,
>
> I am solving a non-linear problem and using a finite difference
> approximation with coloring to compute the Jacobian matrix.
>
> There are several coloring algorithms available in PETSc as indicated here:
> https://petsc.org/release/docs/manualpages/Mat/MatColoring.html
>
> And I was wondering how to switch from one to another in the Jacobian
> setup routine and also how to check which coloring algorithm I am currently
> using.
>
> Thank you.
>
>
> Zakariae Jorti
>
>
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