On 7/7/21 12:08 AM, vachanpo...@gmail.com wrote:
Vector<double> temp_vec(gh_vec); // for data output
for(auto &cell: dof_handler.active_cell_iterators()){
if(!(cell->is_locally_owned())) continue;
temp_vec[cell->index()] = gh_vec[cell->global_active_cell_index()];
}
data_out.add_data_vector(temp_vec, "vector");
... then the output looks as expected. So here I have manually set the entries
of the temporary vector using cell->index(), rather than letting the
constructor do the job. For 1d meshes both seem to produce the same output.
What is the correct procedure? What kind of cell index does DataOut use
internally? Any clarification would be greatly appreciated!
You want to use cell->active_cell_index() as the index into the vector. The
vector should have
triangulation.n_active_cells()
as its size. This corresponds to the *local* number of active cells, including
ghost and artificial cells (for which vector entries are then just ignored). I
think step-47 shows this (whether in parallel or not doesn't matter in this
regard).
Best
W.
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Wolfgang Bangerth email: bange...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/
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