petsc-3.11.4 2019-09-28
DMComputeL2Diff
This function computes the L_2 difference between a function u and an FEM interpolant solution u_h.
Synopsis
#include "petscdm.h"
#include "petscdmlabel.h"
#include "petscds.h"
PetscErrorCode DMComputeL2Diff(DM dm, PetscReal time, PetscErrorCode (**funcs)(PetscInt, PetscReal, const PetscReal [], PetscInt, PetscScalar *, void *), void **ctxs, Vec X, PetscReal *diff)
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 diff ||u - u_h||_2
See Also
DMProjectFunction(), DMComputeL2FieldDiff(), DMComputeL2GradientDiff()
Level
developer
Location
src/dm/interface/dm.c
Examples
src/snes/examples/tutorials/ex12.c.html
src/snes/examples/tutorials/ex62.c.html
src/ts/examples/tutorials/ex48.c.html
Implementations
DMComputeL2Diff_DA(DM dm, PetscReal time, PetscErrorCode (**funcs) in src/dm/impls/da/dalocal.c
DMComputeL2Diff_pforest(DM dm, PetscReal time, PetscErrorCode (**funcs) in src/dm/impls/forest/p4est/pforest.c
DMComputeL2Diff_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