int MatZeroRows(Mat mat,IS is, Scalar *diag)Collective on Mat
mat | - the matrix |
is | - index set of rows to remove |
diag | - pointer to value put in all diagonals of eliminated rows. Note that diag is not a pointer to an array, but merely a pointer to a single value. |
The user can set a value in the diagonal entry (or for the AIJ and row formats can optionally remove the main diagonal entry from the nonzero structure as well, by passing a null pointer as the final argument).
For the parallel case, all processes that share the matrix (i.e., those in the communicator used for matrix creation) MUST call this routine, regardless of whether any rows being zeroed are owned by them.
Level:intermediate
Location:src/mat/interface/matrix.c
Matrix Index
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