petsc-master 2020-10-29
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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, DMStagStencil, DMStagStencilLocation, DMStagVecGetValuesStencil(), DMStagVecSetValuesStencil(), DMStagMatSetValuesStencil(), MatSetValuesStencil(), MatAssemblyBegin(), MatAssemblyEnd(), DMCreateMatrix()

Level

advanced

Location

src/dm/impls/stag/stagstencil.c
Index of all DMSTAG routines
Table of Contents for all manual pages
Index of all manual pages