DMPlexComputeL2DiffVec

This function computes the cellwise L_2 difference between a function u and an FEM interpolant solution u_h, and stores it in a Vec.

Synopsis

#include "petscdmplex.h"   
PetscErrorCode DMPlexComputeL2DiffVec(DM dm, PetscReal time, PetscErrorCode (**funcs)(PetscInt, PetscReal, const PetscReal[], PetscInt, PetscScalar *, void *), void **ctxs, Vec X, Vec D)

Collective

Input Parameters

• dm - The DM

• time - The time

• funcs - The functions to evaluate for each field component: NULL means that component does not contribute to error calculation

• ctxs - Optional array of contexts to pass to each function, or NULL.

• X - The coefficient vector u_h

Output Parameter

• D - A Vec which holds the difference ||u - u_h||_2 for each cell

See Also

DMPlex: Unstructured Grids, DM, DMPLEX, DMProjectFunction(), DMComputeL2Diff(), DMPlexComputeL2FieldDiff(), DMComputeL2GradientDiff()

Level

developer

Location

src/dm/impls/plex/plexfem.c

Examples

src/snes/tutorials/ex69.c
src/snes/tutorials/ex13.c
src/snes/tutorials/ex27.c

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