svm_toy.java
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1 import libsvm.*;
2 import java.applet.*;
3 import java.awt.*;
4 import java.util.*;
5 import java.awt.event.*;
6 import java.io.*;
7 
8 public class svm_toy extends Applet {
9 
10  static final String DEFAULT_PARAM="-t 2 -c 100";
11  int XLEN;
12  int YLEN;
13 
14  // off-screen buffer
15 
16  Image buffer;
17  Graphics buffer_gc;
18 
19  // pre-allocated colors
20 
21  final static Color colors[] =
22  {
23  new Color(0,0,0),
24  new Color(0,120,120),
25  new Color(120,120,0),
26  new Color(120,0,120),
27  new Color(0,200,200),
28  new Color(200,200,0),
29  new Color(200,0,200)
30  };
31 
32  class point {
33  point(double x, double y, byte value)
34  {
35  this.x = x;
36  this.y = y;
37  this.value = value;
38  }
39  double x, y;
40  byte value;
41  }
42 
43  Vector<point> point_list = new Vector<point>();
44  byte current_value = 1;
45 
46  public void init()
47  {
48  setSize(getSize());
49 
50  final Button button_change = new Button("Change");
51  Button button_run = new Button("Run");
52  Button button_clear = new Button("Clear");
53  Button button_save = new Button("Save");
54  Button button_load = new Button("Load");
55  final TextField input_line = new TextField(DEFAULT_PARAM);
56 
57  BorderLayout layout = new BorderLayout();
58  this.setLayout(layout);
59 
60  Panel p = new Panel();
61  GridBagLayout gridbag = new GridBagLayout();
62  p.setLayout(gridbag);
63 
64  GridBagConstraints c = new GridBagConstraints();
65  c.fill = GridBagConstraints.HORIZONTAL;
66  c.weightx = 1;
67  c.gridwidth = 1;
68  gridbag.setConstraints(button_change,c);
69  gridbag.setConstraints(button_run,c);
70  gridbag.setConstraints(button_clear,c);
71  gridbag.setConstraints(button_save,c);
72  gridbag.setConstraints(button_load,c);
73  c.weightx = 5;
74  c.gridwidth = 5;
75  gridbag.setConstraints(input_line,c);
76 
77  button_change.setBackground(colors[current_value]);
78 
79  p.add(button_change);
80  p.add(button_run);
81  p.add(button_clear);
82  p.add(button_save);
83  p.add(button_load);
84  p.add(input_line);
85  this.add(p,BorderLayout.SOUTH);
86 
87  button_change.addActionListener(new ActionListener()
88  { public void actionPerformed (ActionEvent e)
89  { button_change_clicked(); button_change.setBackground(colors[current_value]); }});
90 
91  button_run.addActionListener(new ActionListener()
92  { public void actionPerformed (ActionEvent e)
93  { button_run_clicked(input_line.getText()); }});
94 
95  button_clear.addActionListener(new ActionListener()
96  { public void actionPerformed (ActionEvent e)
97  { button_clear_clicked(); }});
98 
99  button_save.addActionListener(new ActionListener()
100  { public void actionPerformed (ActionEvent e)
101  { button_save_clicked(input_line.getText()); }});
102 
103  button_load.addActionListener(new ActionListener()
104  { public void actionPerformed (ActionEvent e)
105  { button_load_clicked(); }});
106 
107  input_line.addActionListener(new ActionListener()
108  { public void actionPerformed (ActionEvent e)
109  { button_run_clicked(input_line.getText()); }});
110 
111  this.enableEvents(AWTEvent.MOUSE_EVENT_MASK);
112  }
113 
114  void draw_point(point p)
115  {
116  Color c = colors[p.value+3];
117 
118  Graphics window_gc = getGraphics();
119  buffer_gc.setColor(c);
120  buffer_gc.fillRect((int)(p.x*XLEN),(int)(p.y*YLEN),4,4);
121  window_gc.setColor(c);
122  window_gc.fillRect((int)(p.x*XLEN),(int)(p.y*YLEN),4,4);
123  }
124 
125  void clear_all()
126  {
127  point_list.removeAllElements();
128  if(buffer != null)
129  {
130  buffer_gc.setColor(colors[0]);
131  buffer_gc.fillRect(0,0,XLEN,YLEN);
132  }
133  repaint();
134  }
135 
136  void draw_all_points()
137  {
138  int n = point_list.size();
139  for(int i=0;i<n;i++)
140  draw_point(point_list.elementAt(i));
141  }
142 
143  void button_change_clicked()
144  {
145  ++current_value;
146  if(current_value > 3) current_value = 1;
147  }
148 
149  private static double atof(String s)
150  {
151  return Double.valueOf(s).doubleValue();
152  }
153 
154  private static int atoi(String s)
155  {
156  return Integer.parseInt(s);
157  }
158 
159  void button_run_clicked(String args)
160  {
161  // guard
162  if(point_list.isEmpty()) return;
163 
164  svm_parameter param = new svm_parameter();
165 
166  // default values
167  param.svm_type = svm_parameter.C_SVC;
168  param.kernel_type = svm_parameter.RBF;
169  param.degree = 3;
170  param.gamma = 0;
171  param.coef0 = 0;
172  param.nu = 0.5;
173  param.cache_size = 40;
174  param.C = 1;
175  param.eps = 1e-3;
176  param.p = 0.1;
177  param.shrinking = 1;
178  param.probability = 0;
179  param.nr_weight = 0;
180  param.weight_label = new int[0];
181  param.weight = new double[0];
182 
183  // parse options
184  StringTokenizer st = new StringTokenizer(args);
185  String[] argv = new String[st.countTokens()];
186  for(int i=0;i<argv.length;i++)
187  argv[i] = st.nextToken();
188 
189  for(int i=0;i<argv.length;i++)
190  {
191  if(argv[i].charAt(0) != '-') break;
192  if(++i>=argv.length)
193  {
194  System.err.print("unknown option\n");
195  break;
196  }
197  switch(argv[i-1].charAt(1))
198  {
199  case 's':
200  param.svm_type = atoi(argv[i]);
201  break;
202  case 't':
203  param.kernel_type = atoi(argv[i]);
204  break;
205  case 'd':
206  param.degree = atoi(argv[i]);
207  break;
208  case 'g':
209  param.gamma = atof(argv[i]);
210  break;
211  case 'r':
212  param.coef0 = atof(argv[i]);
213  break;
214  case 'n':
215  param.nu = atof(argv[i]);
216  break;
217  case 'm':
218  param.cache_size = atof(argv[i]);
219  break;
220  case 'c':
221  param.C = atof(argv[i]);
222  break;
223  case 'e':
224  param.eps = atof(argv[i]);
225  break;
226  case 'p':
227  param.p = atof(argv[i]);
228  break;
229  case 'h':
230  param.shrinking = atoi(argv[i]);
231  break;
232  case 'b':
233  param.probability = atoi(argv[i]);
234  break;
235  case 'w':
236  ++param.nr_weight;
237  {
238  int[] old = param.weight_label;
239  param.weight_label = new int[param.nr_weight];
240  System.arraycopy(old,0,param.weight_label,0,param.nr_weight-1);
241  }
242 
243  {
244  double[] old = param.weight;
245  param.weight = new double[param.nr_weight];
246  System.arraycopy(old,0,param.weight,0,param.nr_weight-1);
247  }
248 
249  param.weight_label[param.nr_weight-1] = atoi(argv[i-1].substring(2));
250  param.weight[param.nr_weight-1] = atof(argv[i]);
251  break;
252  default:
253  System.err.print("unknown option\n");
254  }
255  }
256 
257  // build problem
258  svm_problem prob = new svm_problem();
259  prob.l = point_list.size();
260  prob.y = new double[prob.l];
261 
262  if(param.kernel_type == svm_parameter.PRECOMPUTED)
263  {
264  }
265  else if(param.svm_type == svm_parameter.EPSILON_SVR ||
266  param.svm_type == svm_parameter.NU_SVR)
267  {
268  if(param.gamma == 0) param.gamma = 1;
269  prob.x = new svm_node[prob.l][1];
270  for(int i=0;i<prob.l;i++)
271  {
272  point p = point_list.elementAt(i);
273  prob.x[i][0] = new svm_node();
274  prob.x[i][0].index = 1;
275  prob.x[i][0].value = p.x;
276  prob.y[i] = p.y;
277  }
278 
279  // build model & classify
280  svm_model model = svm.svm_train(prob, param);
281  svm_node[] x = new svm_node[1];
282  x[0] = new svm_node();
283  x[0].index = 1;
284  int[] j = new int[XLEN];
285 
286  Graphics window_gc = getGraphics();
287  for (int i = 0; i < XLEN; i++)
288  {
289  x[0].value = (double) i / XLEN;
290  j[i] = (int)(YLEN*svm.svm_predict(model, x));
291  }
292 
293  buffer_gc.setColor(colors[0]);
294  buffer_gc.drawLine(0,0,0,YLEN-1);
295  window_gc.setColor(colors[0]);
296  window_gc.drawLine(0,0,0,YLEN-1);
297 
298  int p = (int)(param.p * YLEN);
299  for(int i=1;i<XLEN;i++)
300  {
301  buffer_gc.setColor(colors[0]);
302  buffer_gc.drawLine(i,0,i,YLEN-1);
303  window_gc.setColor(colors[0]);
304  window_gc.drawLine(i,0,i,YLEN-1);
305 
306  buffer_gc.setColor(colors[5]);
307  window_gc.setColor(colors[5]);
308  buffer_gc.drawLine(i-1,j[i-1],i,j[i]);
309  window_gc.drawLine(i-1,j[i-1],i,j[i]);
310 
311  if(param.svm_type == svm_parameter.EPSILON_SVR)
312  {
313  buffer_gc.setColor(colors[2]);
314  window_gc.setColor(colors[2]);
315  buffer_gc.drawLine(i-1,j[i-1]+p,i,j[i]+p);
316  window_gc.drawLine(i-1,j[i-1]+p,i,j[i]+p);
317 
318  buffer_gc.setColor(colors[2]);
319  window_gc.setColor(colors[2]);
320  buffer_gc.drawLine(i-1,j[i-1]-p,i,j[i]-p);
321  window_gc.drawLine(i-1,j[i-1]-p,i,j[i]-p);
322  }
323  }
324  }
325  else
326  {
327  if(param.gamma == 0) param.gamma = 0.5;
328  prob.x = new svm_node [prob.l][2];
329  for(int i=0;i<prob.l;i++)
330  {
331  point p = point_list.elementAt(i);
332  prob.x[i][0] = new svm_node();
333  prob.x[i][0].index = 1;
334  prob.x[i][0].value = p.x;
335  prob.x[i][1] = new svm_node();
336  prob.x[i][1].index = 2;
337  prob.x[i][1].value = p.y;
338  prob.y[i] = p.value;
339  }
340 
341  // build model & classify
342  svm_model model = svm.svm_train(prob, param);
343  svm_node[] x = new svm_node[2];
344  x[0] = new svm_node();
345  x[1] = new svm_node();
346  x[0].index = 1;
347  x[1].index = 2;
348 
349  Graphics window_gc = getGraphics();
350  for (int i = 0; i < XLEN; i++)
351  for (int j = 0; j < YLEN ; j++) {
352  x[0].value = (double) i / XLEN;
353  x[1].value = (double) j / YLEN;
354  double d = svm.svm_predict(model, x);
355  if (param.svm_type == svm_parameter.ONE_CLASS && d<0) d=2;
356  buffer_gc.setColor(colors[(int)d]);
357  window_gc.setColor(colors[(int)d]);
358  buffer_gc.drawLine(i,j,i,j);
359  window_gc.drawLine(i,j,i,j);
360  }
361  }
362 
363  draw_all_points();
364  }
365 
366  void button_clear_clicked()
367  {
368  clear_all();
369  }
370 
371  void button_save_clicked(String args)
372  {
373  FileDialog dialog = new FileDialog(new Frame(),"Save",FileDialog.SAVE);
374  dialog.setVisible(true);
375  String filename = dialog.getDirectory() + dialog.getFile();
376  if (filename == null) return;
377  try {
378  DataOutputStream fp = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(filename)));
379 
380  int svm_type = svm_parameter.C_SVC;
381  int svm_type_idx = args.indexOf("-s ");
382  if(svm_type_idx != -1)
383  {
384  StringTokenizer svm_str_st = new StringTokenizer(args.substring(svm_type_idx+2).trim());
385  svm_type = atoi(svm_str_st.nextToken());
386  }
387 
388  int n = point_list.size();
389  if(svm_type == svm_parameter.EPSILON_SVR || svm_type == svm_parameter.NU_SVR)
390  {
391  for(int i=0;i<n;i++)
392  {
393  point p = point_list.elementAt(i);
394  fp.writeBytes(p.y+" 1:"+p.x+"\n");
395  }
396  }
397  else
398  {
399  for(int i=0;i<n;i++)
400  {
401  point p = point_list.elementAt(i);
402  fp.writeBytes(p.value+" 1:"+p.x+" 2:"+p.y+"\n");
403  }
404  }
405  fp.close();
406  } catch (IOException e) { System.err.print(e); }
407  }
408 
409  void button_load_clicked()
410  {
411  FileDialog dialog = new FileDialog(new Frame(),"Load",FileDialog.LOAD);
412  dialog.setVisible(true);
413  String filename = dialog.getDirectory() + dialog.getFile();
414  if (filename == null) return;
415  clear_all();
416  try {
417  BufferedReader fp = new BufferedReader(new FileReader(filename));
418  String line;
419  while((line = fp.readLine()) != null)
420  {
421  StringTokenizer st = new StringTokenizer(line," \t\n\r\f:");
422  if(st.countTokens() == 5)
423  {
424  byte value = (byte)atoi(st.nextToken());
425  st.nextToken();
426  double x = atof(st.nextToken());
427  st.nextToken();
428  double y = atof(st.nextToken());
429  point_list.addElement(new point(x,y,value));
430  }
431  else if(st.countTokens() == 3)
432  {
433  double y = atof(st.nextToken());
434  st.nextToken();
435  double x = atof(st.nextToken());
436  point_list.addElement(new point(x,y,current_value));
437  }else
438  break;
439  }
440  fp.close();
441  } catch (IOException e) { System.err.print(e); }
442  draw_all_points();
443  }
444 
445  protected void processMouseEvent(MouseEvent e)
446  {
447  if(e.getID() == MouseEvent.MOUSE_PRESSED)
448  {
449  if(e.getX() >= XLEN || e.getY() >= YLEN) return;
450  point p = new point((double)e.getX()/XLEN,
451  (double)e.getY()/YLEN,
452  current_value);
453  point_list.addElement(p);
454  draw_point(p);
455  }
456  }
457 
458  public void paint(Graphics g)
459  {
460  // create buffer first time
461  if(buffer == null) {
462  buffer = this.createImage(XLEN,YLEN);
463  buffer_gc = buffer.getGraphics();
464  buffer_gc.setColor(colors[0]);
465  buffer_gc.fillRect(0,0,XLEN,YLEN);
466  }
467  g.drawImage(buffer,0,0,this);
468  }
469 
470  public Dimension getPreferredSize() { return new Dimension(XLEN,YLEN+50); }
471 
472  public void setSize(Dimension d) { setSize(d.width,d.height); }
473  public void setSize(int w,int h) {
474  super.setSize(w,h);
475  XLEN = w;
476  YLEN = h-50;
477  clear_all();
478  }
479 
480  public static void main(String[] argv)
481  {
482  new AppletFrame("svm_toy",new svm_toy(),500,500+50);
483  }
484 }
485 
486 class AppletFrame extends Frame {
487  AppletFrame(String title, Applet applet, int width, int height)
488  {
489  super(title);
490  this.addWindowListener(new WindowAdapter() {
491  public void windowClosing(WindowEvent e) {
492  System.exit(0);
493  }
494  });
495  applet.init();
496  applet.setSize(width,height);
497  applet.start();
498  this.add(applet);
499  this.pack();
500  this.setVisible(true);
501  }
502 }
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haf_grasping
Author(s): David Fischinger
autogenerated on Sat Apr 1 2023 02:23:27