petsc-3.13.6 2020-09-29
MatNestGetSubMat
Returns a single, sub-matrix from a nest matrix.
Synopsis
#include "petscmat.h"
PetscErrorCode MatNestGetSubMat(Mat A,PetscInt idxm,PetscInt jdxm,Mat *sub)
Not collective
Input Parameters
| A | - nest matrix
|
| idxm | - index of the matrix within the nest matrix
|
| jdxm | - index of the matrix within the nest matrix
|
Output Parameter
sub -matrix at index idxm,jdxm within the nest matrix
See Also
MatNestGetSize(), MatNestGetSubMats(), MatCreateNest(), MATNEST, MatNestSetSubMat(),
MatNestGetLocalISs(), MatNestGetISs()
Level
developer
Location
src/mat/impls/nest/matnest.c
Implementations
MatNestGetSubMat_Nest in src/mat/impls/nest/matnest.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages