MatStencil#
Data structure (C struct) for storing information about rows and columns of a matrix as indexed on an associated grid. These are arguments to MatSetStencil()
and MatSetBlockStencil()
Synopsis#
typedef struct {
PetscInt k, j, i, c;
} MatStencil;
Notes#
The i,j, and k represent the logical coordinates over the entire grid (for 2 and 1 dimensional problems the k and j entries are ignored).
The c represents the degrees of freedom at each grid point (the dof argument to DMDASetDOF()
). If dof is 1 then this entry is ignored.
For stencil access to vectors see DMDAVecGetArray()
, DMDAVecGetArrayF90()
.
For staggered grids, see DMStagStencil
Fortran Note#
See MatSetValuesStencil()
for details.
See Also#
Matrices, Mat
, MatSetValuesStencil()
, MatSetStencil()
, MatSetValuesBlockedStencil()
, DMDAVecGetArray()
, DMDAVecGetArrayF90()
,
DMStagStencil
Level#
beginner
Location#
Examples#
src/ts/tutorials/ex15.c
src/ksp/ksp/tutorials/ex32.c
src/dm/impls/stag/tutorials/ex1.c
src/ts/tutorials/extchemfield.c
src/dm/tutorials/ex22.c
src/ts/tutorials/ex32.c
src/ts/tutorials/ex13.c
src/ts/tutorials/ex17.c
src/dm/tutorials/ex25.c
src/dm/tutorials/ex14.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages