petsc-3.14.6 2021-03-30
DMComputeL2FieldDiff
This function computes the L_2 difference between a function u and an FEM interpolant solution u_h, separated into field components.
Synopsis
#include "petscdm.h"
#include "petscdmlabel.h"
#include "petscds.h"
PetscErrorCode DMComputeL2FieldDiff(DM dm, PetscReal time, PetscErrorCode (**funcs)(PetscInt, PetscReal, const PetscReal [], PetscInt, PetscScalar *, void *), void **ctxs, Vec X, 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.
|
| X | - The coefficient vector u_h, a global vector
|
Output Parameter
| diff | - The array of differences, ||u^f - u^f_h||_2
|
See Also
DMProjectFunction(), DMComputeL2FieldDiff(), DMComputeL2GradientDiff()
Level
developer
Location
src/dm/interface/dm.c
Examples
src/ts/tutorials/ex46.c.html
Implementations
DMComputeL2FieldDiff_pforest(DM dm, PetscReal time, PetscErrorCode (**funcs) in src/dm/impls/forest/p4est/pforest.c
DMComputeL2FieldDiff_Plex(DM dm, PetscReal time, PetscErrorCode (**funcs) in src/dm/impls/plex/plexfem.c
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages