#include "petscmat.h" PetscErrorCode MatCreateConstantDiagonal(MPI_Comm comm,PetscInt m,PetscInt n,PetscInt M,PetscInt N,PetscScalar diag,Mat *J)Collective
comm | - MPI communicator | |
m | - number of local rows (or PETSC_DECIDE to have calculated if M is given) This value should be the same as the local size used in creating the y vector for the matrix-vector product y = Ax. | |
n | - This value should be the same as the local size used in creating the x vector for the matrix-vector product y = Ax. (or PETSC_DECIDE to have calculated if N is given) For square matrices n is almost always m. | |
M | - number of global rows (or PETSC_DETERMINE to have calculated if m is given) | |
N | - number of global columns (or PETSC_DETERMINE to have calculated if n is given) | |
diag | - the diagonal value |
J | - the diagonal matrix |