How to zero specified rows of a hypre CSRMatrix?

[jczhang07]

The matrix location might be HOST or DEVICE. I could not find a routine for me to do that. Thanks.

[liruipeng]

We don't have it for specified rows. For the whole matrix you can do

hypre_CSRMatrixSetConstantValues(A, value);

[victorapm]

Junchao, can you provide more details on why you need this feature? Would you be interested in using it to impose boundary conditions, for example?

Thanks!

[jczhang07]

Yes, to impose boundary conditions and to implement PETSc MatZerosRows (https://petsc.org/release/manualpages/Mat/MatZeroRows) with a Hypre CSRMatrix underneath.

[victorapm]

Sounds good, Junchao! I'll bring this up in our next hypre meeting and the team will come up with a plan to implement this functionality.