petsc-master 2020-10-29
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DMComputeL2DiffLocal

This function computes the L_2 difference between a function u and an FEM interpolant solution u_h.

Synopsis

#include "petscdmplex.h"   
PetscErrorCode DMPlexComputeL2DiffLocal(DM dm, PetscReal time, PetscErrorCode (**funcs)(PetscInt, PetscReal, const PetscReal [], PetscInt, PetscScalar *, void *), void **ctxs, Vec localX, PetscReal *diff)
Collective on dm

Input Parameters

dm - The DM
time - The time
funcs - The functions to evaluate for each field component
ctxs - Optional array of contexts to pass to each function, or NULL.
localX - The coefficient vector u_h, a local vector

Output Parameter

diff - The diff ||u - u_h||_2

See Also

DMProjectFunction(), DMComputeL2FieldDiff(), DMComputeL2GradientDiff()

Level

developer

Location

src/dm/impls/plex/plexfem.c
Index of all DMPLEX routines
Table of Contents for all manual pages
Index of all manual pages