anchor.diff:  %% - Receives:
   %%   * set of known types
   %%   * set of known times
  -%%   * a dictionary that maps nodes to dictionaries 
  +%%   * a dictionary that maps nodes to dictionaries
   %%     (from times to pairs {bytes, type})
  -%% - Produces a dictionary that maps types to a list of 
  +%% - Produces a dictionary that maps types to a list of
   %%   pairs {time, bytes}
   average(Types, Times, Map) ->
       Empty = create_empty_dict_type_to_time_and_bytes(Types, Times),
  
positive.code:                     orddict:new()
              end,
  
              %% Update dictionary `TimeToLogs0` adding new pair log to 
              %% the list of logs mapped to time `TimeF`
              TimeToLogs1 = orddict:append(TimeF, {BytesF, Type}, TimeToLogs0),
  
  
negative.code:     lager:info("Wrote average to files: ~p", [InputFiles]),
  
      Titles = get_titles(Types),
  
      Result = run_gnuplot(InputFiles, Titles),
      _ = lager:info("Generating plot. Output: ~p", [Result]),
      ok.
  