attributeselectionpanel.java

代码是一个分类器的实现,其中使用了部分weka的源代码。可以将项目导入eclipse运行

		inst.stratify(numFolds);
	      }
	      for (int fold = 0; fold < numFolds;fold++) {
		m_Log.statusMessage("Creating splits for fold "
				    + (fold + 1) + "...");
		Instances train = inst.trainCV(numFolds, fold, random);
		m_Log.statusMessage("Selecting attributes using all but fold "
				    + (fold + 1) + "...");
		
		eval.selectAttributesCVSplit(train);
	      }
	      break;
	      default:
	      throw new Exception("Test mode not implemented");
	    }

	    if (testMode == 0) {
	      outBuff.append(eval.toResultsString());
	    } else {
	      outBuff.append(eval.CVResultsString());
	    }
	  
	    outBuff.append("\n");
	    m_History.updateResult(name);
	    m_Log.logMessage("Finished " + ename+" "+sname);
	    m_Log.statusMessage("OK");
	  } catch (Exception ex) {
	    m_Log.logMessage(ex.getMessage());
	    m_Log.statusMessage("See error log");
	  } finally {
	    if (evaluator instanceof AttributeTransformer) {
	      try {
		Instances transformed = 
		  ((AttributeTransformer)evaluator).transformedData();
		transformed.
		  setRelationName("AT: "+transformed.relationName());

		FastVector vv = new FastVector();
		vv.addElement(transformed);
		m_History.addObject(name, vv);
	      } catch (Exception ex) {
		System.err.println(ex);
		ex.printStackTrace();
	      }
	    } else if (testMode == 0) {
	      try {
		Instances reducedInst = eval.reduceDimensionality(inst);
		FastVector vv = new FastVector();
		vv.addElement(reducedInst);
		m_History.addObject(name, vv);
	      } catch (Exception ex) {
		ex.printStackTrace();
	      }
	    }
	    if (isInterrupted()) {
	      m_Log.logMessage("Interrupted " + ename+" "+sname);
	      m_Log.statusMessage("See error log");
	    }
	    m_RunThread = null;
	    m_StartBut.setEnabled(true);
	    m_StopBut.setEnabled(false);
	    if (m_Log instanceof TaskLogger) {
	      ((TaskLogger)m_Log).taskFinished();
	    }
	  }
	}
      };
      m_RunThread.setPriority(Thread.MIN_PRIORITY);
      m_RunThread.start();
    }
  }
  
  /**
   * Stops the currently running attribute selection (if any).
   */
  protected void stopAttributeSelection() {

    if (m_RunThread != null) {
      m_RunThread.interrupt();
      
      // This is deprecated (and theoretically the interrupt should do).
      m_RunThread.stop();
      
    }
  }
  
  /**
   * Save the named buffer to a file.
   * @param name the name of the buffer to be saved.
   */
  protected void saveBuffer(String name) {
    StringBuffer sb = m_History.getNamedBuffer(name);
    if (sb != null) {
      if (m_SaveOut.save(sb)) {
	m_Log.logMessage("Save succesful.");
      }
    }
  }

  /**
   * Popup a visualize panel for viewing transformed data
   * 
   * @param ti          the Instances to display
   */
  protected void visualizeTransformedData(Instances ti) {
    if (ti != null) {
      MatrixPanel mp = new MatrixPanel();
      mp.setInstances(ti);
      String plotName = ti.relationName();
      final javax.swing.JFrame jf = 
	new javax.swing.JFrame("Weka Attribute Selection Visualize: "
			       +plotName);
      jf.setSize(800,600);
      jf.getContentPane().setLayout(new BorderLayout());
      jf.getContentPane().add(mp, BorderLayout.CENTER);
      jf.addWindowListener(new java.awt.event.WindowAdapter() {
	  public void windowClosing(java.awt.event.WindowEvent e) {
	    jf.dispose();
	  }
	});

      jf.setVisible(true);
    }
  }

  /**
   * Popup a SaveDialog for saving the transformed data
   * 
   * @param ti          the Instances to display
   */
  protected void saveTransformedData(Instances ti) {
    JFileChooser        fc;
    int                 retVal;
    BufferedWriter      writer;
    ExtensionFileFilter filter;

    fc     = new JFileChooser();
    filter = new ExtensionFileFilter(".arff", "ARFF data files");
    fc.setFileFilter(filter);
    retVal = fc.showSaveDialog(this);

    if (retVal == JFileChooser.APPROVE_OPTION) {
      try {
        writer = new BufferedWriter(new FileWriter(fc.getSelectedFile()));
        writer.write(ti.toString());
        writer.flush();
        writer.close();
      }
      catch (Exception e) {
        e.printStackTrace();
        m_Log.logMessage("Problem saving data: " + e.getMessage());
        JOptionPane.showMessageDialog(
            this, 
            "Problem saving data:\n" + e.getMessage(), 
            "Error", 
            JOptionPane.ERROR_MESSAGE);
      }
    }
  }

  /**
   * Handles constructing a popup menu with visualization options
   * @param name the name of the result history list entry clicked on by
   * the user.
   * @param x the x coordinate for popping up the menu
   * @param y the y coordinate for popping up the menu
   */
  protected void visualize(String name, int x, int y) {
    final String selectedName = name;
    JPopupMenu resultListMenu = new JPopupMenu();

    JMenuItem visMainBuffer = new JMenuItem("View in main window");
    if (selectedName != null) {
      visMainBuffer.addActionListener(new ActionListener() {
	  public void actionPerformed(ActionEvent e) {
	    m_History.setSingle(selectedName);
	  }
	});
    } else {
      visMainBuffer.setEnabled(false);
    }
    resultListMenu.add(visMainBuffer);

    JMenuItem visSepBuffer = new JMenuItem("View in separate window");
    if (selectedName != null) {
    visSepBuffer.addActionListener(new ActionListener() {
	public void actionPerformed(ActionEvent e) {
	  m_History.openFrame(selectedName);
	}
      });
    } else {
      visSepBuffer.setEnabled(false);
    }
    resultListMenu.add(visSepBuffer);

    JMenuItem saveOutput = new JMenuItem("Save result buffer");
    if (selectedName != null) {
    saveOutput.addActionListener(new ActionListener() {
	public void actionPerformed(ActionEvent e) {
	  saveBuffer(selectedName);
	}
      });
    } else {
      saveOutput.setEnabled(false);
    }
    resultListMenu.add(saveOutput);
    
    JMenuItem deleteOutput = new JMenuItem("Delete result buffer");
    if (selectedName != null) {
      deleteOutput.addActionListener(new ActionListener() {
	public void actionPerformed(ActionEvent e) {
	  m_History.removeResult(selectedName);
	}
      });
    } else {
      deleteOutput.setEnabled(false);
    }
    resultListMenu.add(deleteOutput);


    FastVector o = null;
    if (selectedName != null) {
      o = (FastVector)m_History.getNamedObject(selectedName);
    }    

    //    VisualizePanel temp_vp = null;
    Instances tempTransformed = null;

    if (o != null) {
      for (int i = 0; i < o.size(); i++) {
	Object temp = o.elementAt(i);
	//	if (temp instanceof VisualizePanel) {
	if (temp instanceof Instances) {
	  //	  temp_vp = (VisualizePanel)temp;
	  tempTransformed = (Instances) temp;
	} 
      }
    }
    
    //    final VisualizePanel vp = temp_vp;
    final Instances ti = tempTransformed;
    JMenuItem visTrans = null;
    
    if (ti != null) {
      if (ti.relationName().startsWith("AT:")) {
	visTrans = new JMenuItem("Visualize transformed data");
      } else {
	visTrans = new JMenuItem("Visualize reduced data");
      }
      resultListMenu.addSeparator();
    }

    //    JMenuItem visTrans = new JMenuItem("Visualize transformed data");
    if (ti != null && visTrans != null) {
      visTrans.addActionListener(new ActionListener() {
	  public void actionPerformed(ActionEvent e) {
	    visualizeTransformedData(ti);
	  }
	});
    }
     
    if (visTrans != null) {
      resultListMenu.add(visTrans);
    }
    
    JMenuItem saveTrans = null;
    if (ti != null) {
      if (ti.relationName().startsWith("AT:"))
        saveTrans = new JMenuItem("Save transformed data...");
      else
        saveTrans = new JMenuItem("Save reduced data...");
    }
    if (saveTrans != null) {
      saveTrans.addActionListener(new ActionListener() {
          public void actionPerformed(ActionEvent e) {
            saveTransformedData(ti);
          }
      });
      resultListMenu.add(saveTrans);
    }
    
    resultListMenu.show(m_History.getList(), x, y);
  }
  
  /**
   * updates the capabilities filter of the GOE
   * 
   * @param filter	the new filter to use
   */
  protected void updateCapabilitiesFilter(Capabilities filter) {
    Instances 		tempInst;
    Capabilities 	filterClass;
    Capabilities	filterMerged;

    if (filter == null) {
      m_AttributeEvaluatorEditor.setCapabilitiesFilter(new Capabilities(null));
      m_AttributeSearchEditor.setCapabilitiesFilter(new Capabilities(null));
      return;
    }
    
    // class index is never set in Explorer!
    filter.disable(Capability.NO_CLASS);
    filter.disableAllClasses();

    // determine class attribute (will miss missing class values, but for
    // efficiency reasons we don't examine the complete dataset again!)
    if (!ExplorerDefaults.getInitGenericObjectEditorFilter())
      tempInst = new Instances(m_Instances, 0);
    else
      tempInst = new Instances(m_Instances);
    tempInst.setClassIndex(m_ClassCombo.getSelectedIndex());
    filterClass = null;
    try {
      filterClass = Capabilities.forInstances(tempInst);
    }
    catch (Exception e) {
      filterClass = new Capabilities(null);
    }
    
    // generate and set new filter
    filterMerged = (Capabilities) filter.clone();
    filterMerged.or(filterClass);
    m_AttributeEvaluatorEditor.setCapabilitiesFilter(filterMerged);
    m_AttributeSearchEditor.setCapabilitiesFilter(filterMerged);
  }
  
  /**
   * method gets called in case of a change event
   * 
   * @param e		the associated change event
   */
  public void capabilitiesFilterChanged(CapabilitiesFilterChangeEvent e) {
    updateCapabilitiesFilter((Capabilities) e.getFilter().clone());
  }

  /**
   * Tests out the attribute selection panel from the command line.
   *
   * @param args may optionally contain the name of a dataset to load.
   */
  public static void main(String [] args) {

    try {
      final javax.swing.JFrame jf =
	new javax.swing.JFrame("Weka Explorer: Select attributes");
      jf.getContentPane().setLayout(new BorderLayout());
      final AttributeSelectionPanel sp = new AttributeSelectionPanel();
      jf.getContentPane().add(sp, BorderLayout.CENTER);
      weka.gui.LogPanel lp = new weka.gui.LogPanel();
      sp.setLog(lp);
      jf.getContentPane().add(lp, BorderLayout.SOUTH);
      jf.addWindowListener(new java.awt.event.WindowAdapter() {
	public void windowClosing(java.awt.event.WindowEvent e) {
	  jf.dispose();
	  System.exit(0);
	}
      });
      jf.pack();
      jf.setVisible(true);
      if (args.length == 1) {
	System.err.println("Loading instances from " + args[0]);
	java.io.Reader r = new java.io.BufferedReader(
			   new java.io.FileReader(args[0]));
	Instances i = new Instances(r);
	sp.setInstances(i);
      }
    } catch (Exception ex) {
      ex.printStackTrace();
      System.err.println(ex.getMessage());
    }
  }
}