petsc-3.4.5 2014-06-29

DMPlexComputeL2Diff

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

Synopsis

#include "petscdmplex.h"   
PetscErrorCode DMPlexComputeL2Diff(DM dm, PetscQuadrature quad[], void (**funcs)(const PetscReal [], PetscScalar *), Vec X, PetscReal *diff)

Input Parameters

dm - The DM
quad - The PetscQuadrature object for each field
funcs - The functions to evaluate for each field component
X - The coefficient vector u_h

Output Parameter

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

See Also

DMPlexProjectFunction()

Level:developer
Location:src/dm/impls/plex/plexfem.c
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages

Examples

src/snes/examples/tutorials/ex12.c.html
src/snes/examples/tutorials/ex31.c.html
src/snes/examples/tutorials/ex62.c.html