New translations svm_toy.java (Chinese Simplified)

lang/zh/gklearn/gedlib/lib/libsvm.3.22/java/svm_toy.java

@@ -0,0 +1,502 @@
+import libsvm.*;
+import java.applet.*;
+import java.awt.*;
+import java.util.*;
+import java.awt.event.*;
+import java.io.*;
+
+public class svm_toy extends Applet {
+
+	static final String DEFAULT_PARAM="-t 2 -c 100";
+	int XLEN;
+	int YLEN;
+
+	// off-screen buffer
+
+	Image buffer;
+	Graphics buffer_gc;
+
+	// pre-allocated colors
+
+	final static Color colors[] =
+	{
+	  new Color(0,0,0),
+	  new Color(0,120,120),
+	  new Color(120,120,0),
+	  new Color(120,0,120),
+	  new Color(0,200,200),
+	  new Color(200,200,0),
+	  new Color(200,0,200)
+	};
+
+	class point {
+		point(double x, double y, byte value)
+		{
+			this.x = x;
+			this.y = y;
+			this.value = value;
+		}
+		double x, y;
+		byte value;
+	}
+
+	Vector<point> point_list = new Vector<point>();
+	byte current_value = 1;
+
+	public void init()
+	{
+		setSize(getSize());
+
+		final Button button_change = new Button("Change");
+		Button button_run = new Button("Run");
+		Button button_clear = new Button("Clear");
+		Button button_save = new Button("Save");
+		Button button_load = new Button("Load");
+		final TextField input_line = new TextField(DEFAULT_PARAM);
+
+		BorderLayout layout = new BorderLayout();
+		this.setLayout(layout);
+
+		Panel p = new Panel();
+		GridBagLayout gridbag = new GridBagLayout();
+		p.setLayout(gridbag);
+
+		GridBagConstraints c = new GridBagConstraints();
+		c.fill = GridBagConstraints.HORIZONTAL;
+		c.weightx = 1;
+		c.gridwidth = 1;
+		gridbag.setConstraints(button_change,c);
+		gridbag.setConstraints(button_run,c);
+		gridbag.setConstraints(button_clear,c);
+		gridbag.setConstraints(button_save,c);
+		gridbag.setConstraints(button_load,c);
+		c.weightx = 5;
+		c.gridwidth = 5;
+		gridbag.setConstraints(input_line,c);
+
+		button_change.setBackground(colors[current_value]);
+
+		p.add(button_change);
+		p.add(button_run);
+		p.add(button_clear);
+		p.add(button_save);
+		p.add(button_load);
+		p.add(input_line);
+		this.add(p,BorderLayout.SOUTH);
+
+		button_change.addActionListener(new ActionListener()
+		{ public void actionPerformed (ActionEvent e)
+		  { button_change_clicked(); button_change.setBackground(colors[current_value]); }});
+
+		button_run.addActionListener(new ActionListener()
+		{ public void actionPerformed (ActionEvent e)
+		  { button_run_clicked(input_line.getText()); }});
+
+		button_clear.addActionListener(new ActionListener()
+		{ public void actionPerformed (ActionEvent e)
+		  { button_clear_clicked(); }});
+
+		button_save.addActionListener(new ActionListener()
+		{ public void actionPerformed (ActionEvent e)
+		  { button_save_clicked(input_line.getText()); }});
+
+		button_load.addActionListener(new ActionListener()
+		{ public void actionPerformed (ActionEvent e)
+		  { button_load_clicked(); }});
+
+		input_line.addActionListener(new ActionListener()
+		{ public void actionPerformed (ActionEvent e)
+		  { button_run_clicked(input_line.getText()); }});
+
+		this.enableEvents(AWTEvent.MOUSE_EVENT_MASK);
+	}
+
+	void draw_point(point p)
+	{
+		Color c = colors[p.value+3];
+
+		Graphics window_gc = getGraphics();
+		buffer_gc.setColor(c);
+		buffer_gc.fillRect((int)(p.x*XLEN),(int)(p.y*YLEN),4,4);
+		window_gc.setColor(c);
+		window_gc.fillRect((int)(p.x*XLEN),(int)(p.y*YLEN),4,4);
+	}
+
+	void clear_all()
+	{
+		point_list.removeAllElements();
+		if(buffer != null)
+		{
+			buffer_gc.setColor(colors[0]);
+			buffer_gc.fillRect(0,0,XLEN,YLEN);
+		}
+		repaint();
+	}
+
+	void draw_all_points()
+	{
+		int n = point_list.size();
+		for(int i=0;i<n;i++)
+			draw_point(point_list.elementAt(i));
+	}
+
+	void button_change_clicked()
+	{
+		++current_value;
+		if(current_value > 3) current_value = 1;
+	}
+
+	private static double atof(String s)
+	{
+		return Double.valueOf(s).doubleValue();
+	}
+
+	private static int atoi(String s)
+	{
+		return Integer.parseInt(s);
+	}
+
+	void button_run_clicked(String args)
+	{
+		// guard
+		if(point_list.isEmpty()) return;
+
+		svm_parameter param = new svm_parameter();
+
+		// default values
+		param.svm_type = svm_parameter.C_SVC;
+		param.kernel_type = svm_parameter.RBF;
+		param.degree = 3;
+		param.gamma = 0;
+		param.coef0 = 0;
+		param.nu = 0.5;
+		param.cache_size = 40;
+		param.C = 1;
+		param.eps = 1e-3;
+		param.p = 0.1;
+		param.shrinking = 1;
+		param.probability = 0;
+		param.nr_weight = 0;
+		param.weight_label = new int[0];
+		param.weight = new double[0];
+
+		// parse options
+		StringTokenizer st = new StringTokenizer(args);
+		String[] argv = new String[st.countTokens()];
+		for(int i=0;i<argv.length;i++)
+			argv[i] = st.nextToken();
+
+		for(int i=0;i<argv.length;i++)
+		{
+			if(argv[i].charAt(0) != '-') break;
+			if(++i>=argv.length)
+			{
+				System.err.print("unknown option\n");
+				break;
+			}
+			switch(argv[i-1].charAt(1))
+			{
+				case 's':
+					param.svm_type = atoi(argv[i]);
+					break;
+				case 't':
+					param.kernel_type = atoi(argv[i]);
+					break;
+				case 'd':
+					param.degree = atoi(argv[i]);
+					break;
+				case 'g':
+					param.gamma = atof(argv[i]);
+					break;
+				case 'r':
+					param.coef0 = atof(argv[i]);
+					break;
+				case 'n':
+					param.nu = atof(argv[i]);
+					break;
+				case 'm':
+					param.cache_size = atof(argv[i]);
+					break;
+				case 'c':
+					param.C = atof(argv[i]);
+					break;
+				case 'e':
+					param.eps = atof(argv[i]);
+					break;
+				case 'p':
+					param.p = atof(argv[i]);
+					break;
+				case 'h':
+					param.shrinking = atoi(argv[i]);
+					break;
+				case 'b':
+					param.probability = atoi(argv[i]);
+					break;
+				case 'w':
+					++param.nr_weight;
+					{
+						int[] old = param.weight_label;
+						param.weight_label = new int[param.nr_weight];
+						System.arraycopy(old,0,param.weight_label,0,param.nr_weight-1);
+					}
+
+					{
+						double[] old = param.weight;
+						param.weight = new double[param.nr_weight];
+						System.arraycopy(old,0,param.weight,0,param.nr_weight-1);
+					}
+
+					param.weight_label[param.nr_weight-1] = atoi(argv[i-1].substring(2));
+					param.weight[param.nr_weight-1] = atof(argv[i]);
+					break;
+				default:
+					System.err.print("unknown option\n");
+			}
+		}
+
+		// build problem
+		svm_problem prob = new svm_problem();
+		prob.l = point_list.size();
+		prob.y = new double[prob.l];
+
+		if(param.kernel_type == svm_parameter.PRECOMPUTED)
+		{
+		}
+		else if(param.svm_type == svm_parameter.EPSILON_SVR ||
+			param.svm_type == svm_parameter.NU_SVR)
+		{
+			if(param.gamma == 0) param.gamma = 1;
+			prob.x = new svm_node[prob.l][1];
+			for(int i=0;i<prob.l;i++)
+			{
+				point p = point_list.elementAt(i);
+				prob.x[i][0] = new svm_node();
+				prob.x[i][0].index = 1;
+				prob.x[i][0].value = p.x;
+				prob.y[i] = p.y;
+			}
+
+			// build model & classify
+			svm_model model = svm.svm_train(prob, param);
+			svm_node[] x = new svm_node[1];
+			x[0] = new svm_node();
+			x[0].index = 1;
+			int[] j = new int[XLEN];
+
+			Graphics window_gc = getGraphics();
+			for (int i = 0; i < XLEN; i++)
+			{
+				x[0].value = (double) i / XLEN;
+				j[i] = (int)(YLEN*svm.svm_predict(model, x));
+			}
+			
+			buffer_gc.setColor(colors[0]);
+			buffer_gc.drawLine(0,0,0,YLEN-1);
+			window_gc.setColor(colors[0]);
+			window_gc.drawLine(0,0,0,YLEN-1);
+			
+			int p = (int)(param.p * YLEN);
+			for(int i=1;i<XLEN;i++)
+			{
+				buffer_gc.setColor(colors[0]);
+				buffer_gc.drawLine(i,0,i,YLEN-1);
+				window_gc.setColor(colors[0]);
+				window_gc.drawLine(i,0,i,YLEN-1);
+
+				buffer_gc.setColor(colors[5]);
+				window_gc.setColor(colors[5]);
+				buffer_gc.drawLine(i-1,j[i-1],i,j[i]);
+				window_gc.drawLine(i-1,j[i-1],i,j[i]);
+
+				if(param.svm_type == svm_parameter.EPSILON_SVR)
+				{
+					buffer_gc.setColor(colors[2]);
+					window_gc.setColor(colors[2]);
+					buffer_gc.drawLine(i-1,j[i-1]+p,i,j[i]+p);
+					window_gc.drawLine(i-1,j[i-1]+p,i,j[i]+p);
+
+					buffer_gc.setColor(colors[2]);
+					window_gc.setColor(colors[2]);
+					buffer_gc.drawLine(i-1,j[i-1]-p,i,j[i]-p);
+					window_gc.drawLine(i-1,j[i-1]-p,i,j[i]-p);
+				}
+			}
+		}
+		else
+		{
+			if(param.gamma == 0) param.gamma = 0.5;
+			prob.x = new svm_node [prob.l][2];
+			for(int i=0;i<prob.l;i++)
+			{
+				point p = point_list.elementAt(i);
+				prob.x[i][0] = new svm_node();
+				prob.x[i][0].index = 1;
+				prob.x[i][0].value = p.x;
+				prob.x[i][1] = new svm_node();
+				prob.x[i][1].index = 2;
+				prob.x[i][1].value = p.y;
+				prob.y[i] = p.value;
+			}
+
+			// build model & classify
+			svm_model model = svm.svm_train(prob, param);
+			svm_node[] x = new svm_node[2];
+			x[0] = new svm_node();
+			x[1] = new svm_node();
+			x[0].index = 1;
+			x[1].index = 2;
+
+			Graphics window_gc = getGraphics();
+			for (int i = 0; i < XLEN; i++)
+				for (int j = 0; j < YLEN ; j++) {
+					x[0].value = (double) i / XLEN;
+					x[1].value = (double) j / YLEN;
+					double d = svm.svm_predict(model, x);
+					if (param.svm_type == svm_parameter.ONE_CLASS && d<0) d=2;
+					buffer_gc.setColor(colors[(int)d]);
+					window_gc.setColor(colors[(int)d]);
+					buffer_gc.drawLine(i,j,i,j);
+					window_gc.drawLine(i,j,i,j);
+			}
+		}
+
+		draw_all_points();
+	}
+
+	void button_clear_clicked()
+	{
+		clear_all();
+	}
+
+	void button_save_clicked(String args)
+	{
+		FileDialog dialog = new FileDialog(new Frame(),"Save",FileDialog.SAVE);
+		dialog.setVisible(true);
+		String filename = dialog.getDirectory() + dialog.getFile();
+		if (filename == null) return;
+		try {
+			DataOutputStream fp = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(filename)));
+
+			int svm_type = svm_parameter.C_SVC;
+			int svm_type_idx = args.indexOf("-s ");
+			if(svm_type_idx != -1)
+			{
+				StringTokenizer svm_str_st = new StringTokenizer(args.substring(svm_type_idx+2).trim());
+				svm_type = atoi(svm_str_st.nextToken());
+			}
+
+			int n = point_list.size();
+			if(svm_type == svm_parameter.EPSILON_SVR || svm_type == svm_parameter.NU_SVR)
+			{
+				for(int i=0;i<n;i++)
+				{
+					point p = point_list.elementAt(i);
+					fp.writeBytes(p.y+" 1:"+p.x+"\n");
+				}
+			}
+			else
+			{
+				for(int i=0;i<n;i++)
+				{
+					point p = point_list.elementAt(i);
+					fp.writeBytes(p.value+" 1:"+p.x+" 2:"+p.y+"\n");
+				}
+			}
+			fp.close();
+		} catch (IOException e) { System.err.print(e); }
+	}
+
+	void button_load_clicked()
+	{
+		FileDialog dialog = new FileDialog(new Frame(),"Load",FileDialog.LOAD);
+		dialog.setVisible(true);
+		String filename = dialog.getDirectory() + dialog.getFile();
+		if (filename == null) return;
+		clear_all();
+		try {
+			BufferedReader fp = new BufferedReader(new FileReader(filename));
+			String line;
+			while((line = fp.readLine()) != null)
+			{
+				StringTokenizer st = new StringTokenizer(line," \t\n\r\f:");
+				if(st.countTokens() == 5)
+				{
+					byte value = (byte)atoi(st.nextToken());
+					st.nextToken();
+					double x = atof(st.nextToken());
+					st.nextToken();
+					double y = atof(st.nextToken());
+					point_list.addElement(new point(x,y,value));
+				}
+				else if(st.countTokens() == 3)
+				{
+					double y = atof(st.nextToken());
+					st.nextToken();
+					double x = atof(st.nextToken());
+					point_list.addElement(new point(x,y,current_value));
+				}else
+					break;
+			}
+			fp.close();
+		} catch (IOException e) { System.err.print(e); }
+		draw_all_points();
+	}
+	
+	protected void processMouseEvent(MouseEvent e)
+	{
+		if(e.getID() == MouseEvent.MOUSE_PRESSED)
+		{
+			if(e.getX() >= XLEN || e.getY() >= YLEN) return;
+			point p = new point((double)e.getX()/XLEN,
+					    (double)e.getY()/YLEN,
+					    current_value);
+			point_list.addElement(p);
+			draw_point(p);
+		}
+	}
+
+	public void paint(Graphics g)
+	{
+		// create buffer first time
+		if(buffer == null) {
+			buffer = this.createImage(XLEN,YLEN);
+			buffer_gc = buffer.getGraphics();
+			buffer_gc.setColor(colors[0]);
+			buffer_gc.fillRect(0,0,XLEN,YLEN);
+		}
+		g.drawImage(buffer,0,0,this);
+	}
+
+	public Dimension getPreferredSize() { return new Dimension(XLEN,YLEN+50); }
+
+	public void setSize(Dimension d) { setSize(d.width,d.height); }
+	public void setSize(int w,int h) {
+		super.setSize(w,h);
+		XLEN = w;
+		YLEN = h-50;
+		clear_all();
+	}
+
+	public static void main(String[] argv)
+	{
+		new AppletFrame("svm_toy",new svm_toy(),500,500+50);
+	}
+}
+
+class AppletFrame extends Frame {
+	AppletFrame(String title, Applet applet, int width, int height)
+	{
+		super(title);
+		this.addWindowListener(new WindowAdapter() {
+			public void windowClosing(WindowEvent e) {
+				System.exit(0);
+			}
+		});
+		applet.init();
+		applet.setSize(width,height);
+		applet.start();
+		this.add(applet);
+		this.pack();
+		this.setVisible(true);
+	}
+}