Usunięcie osi wykresu, JFreeChart

Jak usunąć wartości na osiach wykresu? Ewentualnie całe osie z wartościami?
Poniżej klasa rysująca wykres z punktów:

class PanelDoRysowania extends JPanel 
        {
                public PanelDoRysowania() 
                {}
                        protected void paintComponent(Graphics g) {
                            super.paintComponent(g);                            
            			   series.clear();
                                        for(int m=-200;m<201;m++){
                                        	if(m==0){
                                        		xx=0;
                                        		int n=m-1;
                                        		int p=m-2;
                                        		double y1, y2;
                                        		s1=Math.sin(k*pi*N*n);
                                                s2=Math.sin(k*pi*a*n/d);
                                                s3=Math.sin(k*pi*n);
                                                M=pi*a*n/d;
                                                y1=s1*s1*s2*s2/(M*M*s3*s3); 
                                                s1=Math.sin(k*pi*N*p);
                                                s2=Math.sin(k*pi*a*p/d);
                                                s3=Math.sin(k*pi*p);
                                                M=pi*a*p/d;
                                                y2=s1*s1*s2*s2/(M*M*s3*s3);
                                                yy=y1+(y1-y2)/3;
                                                series.add(xx, yy);
                                        	}
                                        	else{
                                                xx=m*lambda*L/(100000*d);
                                                s1=Math.sin(k*pi*N*m);
                                                s2=Math.sin(k*pi*a*m/d);
                                                s3=Math.sin(k*pi*m);
                                                M=pi*a*m/d;
                                                yy=s1*s1*s2*s2/(M*M*s3*s3);                                                
                                                series.add(xx, yy); 
                                        	} 
                                        }      
                                        XYSeriesCollection dataset = new XYSeriesCollection();
                        				dataset.addSeries(series);
                        				
                        				w=ChartFactory.createXYLineChart("", "", "Natezenie", dataset,	PlotOrientation.VERTICAL, false, false, false);
                        				
                        				XYPlot plot = (XYPlot) w.getPlot();
                        				plot.setBackgroundPaint(Color.lightGray);
                        				
                        				XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer();
                        				if(lambda>=380&&lambda<400)
                            				renderer.setSeriesPaint(0, Color.magenta);
                        				if(lambda>=400&&lambda<490)
                        					renderer.setSeriesPaint(0, Color.blue);
                        				if(lambda>=490&&lambda<540)
                        					renderer.setSeriesPaint(0, Color.cyan);
                        				if(lambda>=540&&lambda<650)
                            				renderer.setSeriesPaint(0, Color.green);
                        				if(lambda>=650&&lambda<720)
                            				renderer.setSeriesPaint(0, Color.yellow);
                        				if(lambda>=720&&lambda<=760)
                            				renderer.setSeriesPaint(0, Color.red);
                        				renderer.setDefaultShapesVisible(false);
                        				
                        				plot.setRenderer(renderer);
                        				NumberAxis yAxis = (NumberAxis) plot.getRangeAxis();
                        				yAxis.setAutoRangeIncludesZero(false);
                        				
                        				image = w.createBufferedImage(650, 300);
                                        wykres.setIcon(new ImageIcon(image));
                      								                                   
                        }        
        }