public void addCustomData(final Plotter plotter){
  if (plotter == null) {
    throw new IllegalArgumentException("Plotter cannot be null");
  }
  defaultGraph.addPlotter(plotter);
  graphs.add(defaultGraph);
}

public void addCustomData ( final Plotter plotter ) { if ( plotter == null ) { throw new IllegalArgumentException ( "Plotter cannot be null" ) ; } defaultGraph . addPlotter ( plotter ) ; graphs . add ( defaultGraph ) ; }
adds a custom data plotter to the default graph
