private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed
        try {
            final XYDataset dataset = studyDatasetBaseLyon();
            final JFreeChart chart = createSimpleChart(dataset);
            final ChartPanel chartPanel = new ChartPanel(chart);
            jPanel2.removeAll();
            jPanel2.add(chartPanel);
            jPanel2.repaint();
        } catch (IOException ex) {
            Logger.getLogger(NEATFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (Exception ex) {
            Logger.getLogger(NEATFrame.class.getName()).log(Level.SEVERE, null, ex);
        }
    }//GEN-LAST:event_jButton1ActionPerformed