MatSetStencil#

Sets the grid information for setting values into a matrix via MatSetValuesStencil()

Synopsis#

#include "petscmat.h" 
PetscErrorCode MatSetStencil(Mat mat, PetscInt dim, const PetscInt dims[], const PetscInt starts[], PetscInt dof)

Not Collective

Input Parameters#

  • mat - the matrix

  • dim - dimension of the grid 1, 2, or 3

  • dims - number of grid points in x, y, and z direction, including ghost points on your processor

  • starts - starting point of ghost nodes on your processor in x, y, and z direction

  • dof - number of degrees of freedom per node

Notes#

Inspired by the structured grid interface to the HYPRE package (www.llnl.gov/CASC/hyper)

For matrices generated with DMCreateMatrix() this routine is automatically called and so not needed by the user.

See Also#

Mat, MatStencil, MatSetOption(), MatAssemblyBegin(), MatAssemblyEnd(), MatSetValuesBlocked(), MatSetValuesLocal() MatSetValues(), MatSetValuesBlockedStencil(), MatSetValuesStencil()

Level#

beginner

Location#

src/mat/interface/matrix.c

Examples#

src/snes/tutorials/ex48.c.html


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Index of all manual pages