PETSc version 3.15.5
MatCreateSubMatrixVirtual
Creates a virtual matrix that acts as a submatrix 
Synopsis
#include "petscmat.h" 
PetscErrorCode MatCreateSubMatrixVirtual(Mat A,IS isrow,IS iscol,Mat *newmat)
Collective on Mat
Input Parameters
|  | A | - matrix that we will extract a submatrix of | 
|  | isrow | - rows to be present in the submatrix | 
|  | iscol | - columns to be present in the submatrix | 
Output Parameters
Notes
Most will use MatCreateSubMatrix which provides a more efficient representation if it is available.
See Also
 MatCreateSubMatrix(), MatSubMatrixVirtualUpdate()
Level
developer
Location
src/mat/impls/submat/submat.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages