petsc-3.13.6 2020-09-29
VecGetSubVector
Gets a vector representing part of another vector
Synopsis
#include "petscvec.h"
PetscErrorCode VecGetSubVector(Vec X,IS is,Vec *Y)
Collective on IS
Input Arguments
| X | - vector from which to extract a subvector
|
| is | - index set representing portion of X to extract
|
Output Arguments
Y -subvector corresponding to is
Notes
The subvector Y should be returned with VecRestoreSubVector().
This function may return a subvector without making a copy, therefore it is not safe to use the original vector while
modifying the subvector. Other non-overlapping subvectors can still be obtained from X using this function.
See Also
MatCreateSubMatrix()
Level
advanced
Location
src/vec/vec/interface/rvector.c
Examples
src/snes/tutorials/ex70.c.html
Implementations
VecGetSubVector_Nest in src/vec/vec/impls/nest/vecnest.c
Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages