petsc-master 2019-09-16
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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 on dm

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

DMProjectFunction(), DMComputeL2Diff(), DMPlexComputeL2FieldDiff(), 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