MatStencil#
Data structure (C struct) for storing information about a single row or column 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;
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 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().
Fortran usage is different, see MatSetValuesStencil() for details.
See Also#
MatSetValuesStencil(), MatSetStencil(), MatSetValuesBlockedStencil(), DMDAVecGetArray(), DMDAVecGetArrayF90()
Level#
beginner
Location#
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages