#include "petscmat.h" PetscErrorCode MatGetLocalSubMatrix(Mat mat,IS isrow,IS iscol,Mat *submat)Not Collective Many br
Many br
Depending on the format of mat, the returned submat may not implement MatMult(). Its communicator may be Many brthe same as mat, it may be PETSC_COMM_SELF, or some other subcomm of mat's. Many br
The submat always implements MatSetValuesLocal(). If isrow and iscol have the same block size, then Many brMatSetValuesBlockedLocal() will also be implemented. Many br
The mat must have had a ISLocalToGlobalMapping provided to it with MatSetLocalToGlobalMapping(). Note that Many brmatrices obtained with DMCreateMat() generally already have the local to global mapping provided. Many br
Level:intermediate
Location:src/mat/interface/matrix.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages