[petsc-users] xxxSetFromOptions

[Barry Smith]

> On Jan 16, 2017, at 8:35 PM, Manav Bhatia <bhatiamanav at gmail.com> wrote:
> 
> Hi, 
> 
>   If I am using SNES and am calling SNESSetFromOptions, do I need to still call the xxxSetForOptions for mat, vec, ksp and pc? If so, what is the recommended order of these calls? 

  SNESSetFromOptions automatically calls it for KSP and PC underneath. If you wish to set Mat options you should call MatSetFromOptions after you have created the matrix and set its sizes.

   Barry

> 
> Thanks,
> Manav