#include "petscfe.h" PetscErrorCode PetscSpaceGetHeightSubspace(PetscSpace sp, PetscInt height, PetscSpace *subsp)If the space is not defined on mesh points of the given height (e.g. if the space is discontinuous and pointwise values are not defined on the element boundaries), or if the implementation of PetscSpace does not support extracting subspaces, then NULL is returned.
This does not increment the reference count on the returned space, and the user should not destroy it.
|sp||- the PetscSpace object|
|height||- the height of the mesh point for which the subspace is desired|