DMStagMatGetValuesStencil#

retrieve local matrix entries using grid indexing

Synopsis#

PetscErrorCode DMStagMatGetValuesStencil(DM dm, Mat mat, PetscInt nRow, const DMStagStencil *posRow, PetscInt nCol, const DMStagStencil *posCol, PetscScalar *val)

Not Collective

Input Parameters#

  • dm - the DMSTAG object

  • mat - the matrix

  • nRow - number of rows

  • posRow - grid locations (including components) of rows

  • nCol - number of columns

  • posCol - grid locations (including components) of columns

Output Parameter#

  • val - logically two-dimensional array of values

See Also#

DMSTAG: Staggered, Structured Grid, DMSTAG, DMStagStencil, DMStagStencilLocation, DMStagVecGetValuesStencil(), DMStagVecSetValuesStencil(), DMStagMatSetValuesStencil(), MatSetValuesStencil(), MatAssemblyBegin(), MatAssemblyEnd(), DMCreateMatrix()

Level#

advanced

Location#

src/dm/impls/stag/stagstencil.c

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Index of all DMStag routines
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