read data                                                                                                                    
                                                                                                                                                                                   
                                                                                                                                                                                   
                                                                                                                                                                                   
                                                                                                                                                                                   
                                                                                                                                                                                   
                          generate diagrams                                                                                                                                        
                                                                                                                                                                                   
                                                                                                                                                                                   
                                                                                                                                                                                   
                                                      more data?                                                                                                                yes
                                                                                                                                                                                   
                                                                                                                                                                                   
                                                                                                                 no