svm-toy.cpp
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00001 #include <windows.h>
00002 #include <windowsx.h>
00003 #include <stdio.h>
00004 #include <ctype.h>
00005 #include <list>
00006 #include "../../svm.h"
00007 using namespace std;
00008 
00009 #define DEFAULT_PARAM "-t 2 -c 100"
00010 #define XLEN 500
00011 #define YLEN 500
00012 #define DrawLine(dc,x1,y1,x2,y2,c) \
00013         do { \
00014                 HPEN hpen = CreatePen(PS_SOLID,0,c); \
00015                 HPEN horig = SelectPen(dc,hpen); \
00016                 MoveToEx(dc,x1,y1,NULL); \
00017                 LineTo(dc,x2,y2); \
00018                 SelectPen(dc,horig); \
00019                 DeletePen(hpen); \
00020         } while(0)
00021 
00022 using namespace std;
00023 
00024 COLORREF colors[] =
00025 {
00026         RGB(0,0,0),
00027         RGB(0,120,120),
00028         RGB(120,120,0),
00029         RGB(120,0,120),
00030         RGB(0,200,200),
00031         RGB(200,200,0),
00032         RGB(200,0,200)
00033 };
00034 
00035 HWND main_window;
00036 HBITMAP buffer;
00037 HDC window_dc;
00038 HDC buffer_dc;
00039 HBRUSH brush1, brush2, brush3;
00040 HWND edit;
00041 
00042 enum {
00043         ID_BUTTON_CHANGE, ID_BUTTON_RUN, ID_BUTTON_CLEAR,
00044         ID_BUTTON_LOAD, ID_BUTTON_SAVE, ID_EDIT
00045 };
00046 
00047 struct point {
00048         double x, y;
00049         signed char value;
00050 };
00051 
00052 list<point> point_list;
00053 int current_value = 1;
00054 
00055 LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
00056 
00057 int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
00058                    PSTR szCmdLine, int iCmdShow)
00059 {
00060         static char szAppName[] = "SvmToy";
00061         MSG msg;
00062         WNDCLASSEX wndclass;
00063 
00064         wndclass.cbSize = sizeof(wndclass);
00065         wndclass.style = CS_HREDRAW | CS_VREDRAW;
00066         wndclass.lpfnWndProc = WndProc;
00067         wndclass.cbClsExtra = 0;
00068         wndclass.cbWndExtra = 0;
00069         wndclass.hInstance = hInstance;
00070         wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
00071         wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
00072         wndclass.hbrBackground = (HBRUSH) GetStockObject(BLACK_BRUSH);
00073         wndclass.lpszMenuName = NULL;
00074         wndclass.lpszClassName = szAppName;
00075         wndclass.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
00076 
00077         RegisterClassEx(&wndclass);
00078 
00079         main_window = CreateWindow(szAppName,   // window class name
00080                                     "SVM Toy",  // window caption
00081                                     WS_OVERLAPPEDWINDOW,// window style
00082                                     CW_USEDEFAULT,      // initial x position
00083                                     CW_USEDEFAULT,      // initial y position
00084                                     XLEN,       // initial x size
00085                                     YLEN+52,    // initial y size
00086                                     NULL,       // parent window handle
00087                                     NULL,       // window menu handle
00088                                     hInstance,  // program instance handle
00089                                     NULL);      // creation parameters
00090 
00091         ShowWindow(main_window, iCmdShow);
00092         UpdateWindow(main_window);
00093 
00094         CreateWindow("button", "Change", WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON,
00095                      0, YLEN, 50, 25, main_window, (HMENU) ID_BUTTON_CHANGE, hInstance, NULL);
00096         CreateWindow("button", "Run", WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON,
00097                      50, YLEN, 50, 25, main_window, (HMENU) ID_BUTTON_RUN, hInstance, NULL);
00098         CreateWindow("button", "Clear", WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON,
00099                      100, YLEN, 50, 25, main_window, (HMENU) ID_BUTTON_CLEAR, hInstance, NULL);
00100         CreateWindow("button", "Save", WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON,
00101                      150, YLEN, 50, 25, main_window, (HMENU) ID_BUTTON_SAVE, hInstance, NULL);
00102         CreateWindow("button", "Load", WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON,
00103                      200, YLEN, 50, 25, main_window, (HMENU) ID_BUTTON_LOAD, hInstance, NULL);
00104 
00105         edit = CreateWindow("edit", NULL, WS_CHILD | WS_VISIBLE,
00106                             250, YLEN, 250, 25, main_window, (HMENU) ID_EDIT, hInstance, NULL);
00107 
00108         Edit_SetText(edit,DEFAULT_PARAM);
00109 
00110         brush1 = CreateSolidBrush(colors[4]);
00111         brush2 = CreateSolidBrush(colors[5]);
00112         brush3 = CreateSolidBrush(colors[6]);
00113 
00114         window_dc = GetDC(main_window);
00115         buffer = CreateCompatibleBitmap(window_dc, XLEN, YLEN);
00116         buffer_dc = CreateCompatibleDC(window_dc);
00117         SelectObject(buffer_dc, buffer);
00118         PatBlt(buffer_dc, 0, 0, XLEN, YLEN, BLACKNESS);
00119 
00120         while (GetMessage(&msg, NULL, 0, 0)) {
00121                 TranslateMessage(&msg);
00122                 DispatchMessage(&msg);
00123         }
00124         return msg.wParam;
00125 }
00126 
00127 int getfilename( HWND hWnd , char *filename, int len, int save) 
00128 {       
00129         OPENFILENAME OpenFileName;      
00130         memset(&OpenFileName,0,sizeof(OpenFileName));
00131         filename[0]='\0';
00132         
00133         OpenFileName.lStructSize       = sizeof(OPENFILENAME); 
00134         OpenFileName.hwndOwner         = hWnd;  
00135         OpenFileName.lpstrFile         = filename; 
00136         OpenFileName.nMaxFile          = len; 
00137         OpenFileName.Flags             = 0;
00138  
00139         return save?GetSaveFileName(&OpenFileName):GetOpenFileName(&OpenFileName);              
00140 }
00141 
00142 void clear_all()
00143 {
00144         point_list.clear();
00145         PatBlt(buffer_dc, 0, 0, XLEN, YLEN, BLACKNESS);
00146         InvalidateRect(main_window, 0, 0);
00147 }
00148 
00149 HBRUSH choose_brush(int v)
00150 {
00151         if(v==1) return brush1;
00152         else if(v==2) return brush2;
00153         else return brush3;
00154 }
00155 
00156 void draw_point(const point & p)
00157 {
00158         RECT rect;
00159         rect.left = int(p.x*XLEN);
00160         rect.top = int(p.y*YLEN);
00161         rect.right = int(p.x*XLEN) + 3;
00162         rect.bottom = int(p.y*YLEN) + 3;
00163         FillRect(window_dc, &rect, choose_brush(p.value));
00164         FillRect(buffer_dc, &rect, choose_brush(p.value));
00165 }
00166 
00167 void draw_all_points()
00168 {
00169         for(list<point>::iterator p = point_list.begin(); p != point_list.end(); p++)
00170                 draw_point(*p);
00171 }
00172 
00173 void button_run_clicked()
00174 {
00175         // guard
00176         if(point_list.empty()) return;
00177 
00178         svm_parameter param;
00179         int i,j;
00180         
00181         // default values
00182         param.svm_type = C_SVC;
00183         param.kernel_type = RBF;
00184         param.degree = 3;
00185         param.gamma = 0;
00186         param.coef0 = 0;
00187         param.nu = 0.5;
00188         param.cache_size = 100;
00189         param.C = 1;
00190         param.eps = 1e-3;
00191         param.p = 0.1;
00192         param.shrinking = 1;
00193         param.probability = 0;
00194         param.nr_weight = 0;
00195         param.weight_label = NULL;
00196         param.weight = NULL;
00197 
00198         // parse options
00199         char str[1024];
00200         Edit_GetLine(edit, 0, str, sizeof(str));
00201         const char *p = str;
00202 
00203         while (1) {
00204                 while (*p && *p != '-')
00205                         p++;
00206 
00207                 if (*p == '\0')
00208                         break;
00209 
00210                 p++;
00211                 switch (*p++) {
00212                         case 's':
00213                                 param.svm_type = atoi(p);
00214                                 break;
00215                         case 't':
00216                                 param.kernel_type = atoi(p);
00217                                 break;
00218                         case 'd':
00219                                 param.degree = atoi(p);
00220                                 break;
00221                         case 'g':
00222                                 param.gamma = atof(p);
00223                                 break;
00224                         case 'r':
00225                                 param.coef0 = atof(p);
00226                                 break;
00227                         case 'n':
00228                                 param.nu = atof(p);
00229                                 break;
00230                         case 'm':
00231                                 param.cache_size = atof(p);
00232                                 break;
00233                         case 'c':
00234                                 param.C = atof(p);
00235                                 break;
00236                         case 'e':
00237                                 param.eps = atof(p);
00238                                 break;
00239                         case 'p':
00240                                 param.p = atof(p);
00241                                 break;
00242                         case 'h':
00243                                 param.shrinking = atoi(p);
00244                                 break;
00245                         case 'b':
00246                                 param.probability = atoi(p);
00247                                 break;
00248                         case 'w':
00249                                 ++param.nr_weight;
00250                                 param.weight_label = (int *)realloc(param.weight_label,sizeof(int)*param.nr_weight);
00251                                 param.weight = (double *)realloc(param.weight,sizeof(double)*param.nr_weight);
00252                                 param.weight_label[param.nr_weight-1] = atoi(p);
00253                                 while(*p && !isspace(*p)) ++p;
00254                                 param.weight[param.nr_weight-1] = atof(p);
00255                                 break;
00256                 }
00257         }
00258         
00259         // build problem
00260         svm_problem prob;
00261 
00262         prob.l = point_list.size();
00263         prob.y = new double[prob.l];
00264 
00265         if(param.kernel_type == PRECOMPUTED)
00266         {
00267         }
00268         else if(param.svm_type == EPSILON_SVR ||
00269                 param.svm_type == NU_SVR)
00270         {
00271                 if(param.gamma == 0) param.gamma = 1;
00272                 svm_node *x_space = new svm_node[2 * prob.l];
00273                 prob.x = new svm_node *[prob.l];
00274 
00275                 i = 0;
00276                 for (list<point>::iterator q = point_list.begin(); q != point_list.end(); q++, i++)
00277                 {
00278                         x_space[2 * i].index = 1;
00279                         x_space[2 * i].value = q->x;
00280                         x_space[2 * i + 1].index = -1;
00281                         prob.x[i] = &x_space[2 * i];
00282                         prob.y[i] = q->y;
00283                 }
00284 
00285                 // build model & classify
00286                 svm_model *model = svm_train(&prob, &param);
00287                 svm_node x[2];
00288                 x[0].index = 1;
00289                 x[1].index = -1;
00290                 int *j = new int[XLEN];
00291 
00292                 for (i = 0; i < XLEN; i++)
00293                 {
00294                         x[0].value = (double) i / XLEN;
00295                         j[i] = (int)(YLEN*svm_predict(model, x));
00296                 }
00297                 
00298                 DrawLine(buffer_dc,0,0,0,YLEN,colors[0]);
00299                 DrawLine(window_dc,0,0,0,YLEN,colors[0]);
00300                 
00301                 int p = (int)(param.p * YLEN);
00302                 for(int i=1; i < XLEN; i++)
00303                 {
00304                         DrawLine(buffer_dc,i,0,i,YLEN,colors[0]);
00305                         DrawLine(window_dc,i,0,i,YLEN,colors[0]);
00306                         
00307                         DrawLine(buffer_dc,i-1,j[i-1],i,j[i],colors[5]);
00308                         DrawLine(window_dc,i-1,j[i-1],i,j[i],colors[5]);
00309 
00310                         if(param.svm_type == EPSILON_SVR)
00311                         {                       
00312                                 DrawLine(buffer_dc,i-1,j[i-1]+p,i,j[i]+p,colors[2]);
00313                                 DrawLine(window_dc,i-1,j[i-1]+p,i,j[i]+p,colors[2]);
00314 
00315                                 DrawLine(buffer_dc,i-1,j[i-1]-p,i,j[i]-p,colors[2]);
00316                                 DrawLine(window_dc,i-1,j[i-1]-p,i,j[i]-p,colors[2]);
00317                         }
00318                 }
00319                 
00320                 svm_free_and_destroy_model(&model);
00321                 delete[] j;
00322                 delete[] x_space;
00323                 delete[] prob.x;
00324                 delete[] prob.y;
00325         }
00326         else
00327         {
00328                 if(param.gamma == 0) param.gamma = 0.5;
00329                 svm_node *x_space = new svm_node[3 * prob.l];
00330                 prob.x = new svm_node *[prob.l];
00331 
00332                 i = 0;
00333                 for (list<point>::iterator q = point_list.begin(); q != point_list.end(); q++, i++)
00334                 {
00335                         x_space[3 * i].index = 1;
00336                         x_space[3 * i].value = q->x;
00337                         x_space[3 * i + 1].index = 2;
00338                         x_space[3 * i + 1].value = q->y;
00339                         x_space[3 * i + 2].index = -1;
00340                         prob.x[i] = &x_space[3 * i];
00341                         prob.y[i] = q->value;
00342                 }
00343 
00344                 // build model & classify
00345                 svm_model *model = svm_train(&prob, &param);
00346                 svm_node x[3];
00347                 x[0].index = 1;
00348                 x[1].index = 2;
00349                 x[2].index = -1;
00350 
00351                 for (i = 0; i < XLEN; i++)
00352                         for (j = 0; j < YLEN; j++) {
00353                                 x[0].value = (double) i / XLEN;
00354                                 x[1].value = (double) j / YLEN;
00355                                 double d = svm_predict(model, x);
00356                                 if (param.svm_type == ONE_CLASS && d<0) d=2;
00357                                 SetPixel(window_dc, i, j, colors[(int)d]);
00358                                 SetPixel(buffer_dc, i, j, colors[(int)d]);
00359                         }
00360 
00361                 svm_free_and_destroy_model(&model);
00362                 delete[] x_space;
00363                 delete[] prob.x;
00364                 delete[] prob.y;
00365         }
00366         free(param.weight_label);
00367         free(param.weight);
00368         draw_all_points();
00369 }
00370 
00371 LRESULT CALLBACK WndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
00372 {
00373         HDC hdc;
00374         PAINTSTRUCT ps;
00375 
00376         switch (iMsg) {
00377         case WM_LBUTTONDOWN:
00378                 {
00379                         int x = LOWORD(lParam);
00380                         int y = HIWORD(lParam);
00381                         point p = {(double)x/XLEN, (double)y/YLEN, current_value};
00382                         point_list.push_back(p);
00383                         draw_point(p);
00384                 }
00385                 return 0;
00386         case WM_PAINT:
00387                 {
00388                         hdc = BeginPaint(hwnd, &ps);
00389                         BitBlt(hdc, 0, 0, XLEN, YLEN, buffer_dc, 0, 0, SRCCOPY);
00390                         EndPaint(hwnd, &ps);
00391                 }
00392                 return 0;
00393         case WM_COMMAND:
00394                 {
00395                         int id = LOWORD(wParam);
00396                         switch (id) {
00397                         case ID_BUTTON_CHANGE:
00398                                 ++current_value;
00399                                 if(current_value > 3) current_value = 1;
00400                                 break;
00401                         case ID_BUTTON_RUN:
00402                                 button_run_clicked();
00403                                 break;
00404                         case ID_BUTTON_CLEAR:
00405                                 clear_all();                            
00406                                 break;
00407                         case ID_BUTTON_SAVE:
00408                                 {
00409                                         char filename[1024];
00410                                         if(getfilename(hwnd,filename,1024,1))
00411                                         {
00412                                                 FILE *fp = fopen(filename,"w");
00413                                                 if(fp)
00414                                                 {
00415                                                         for (list<point>::iterator p = point_list.begin(); p != point_list.end(); p++)
00416                                                                 fprintf(fp,"%d 1:%f 2:%f\n",p->value,p->x,p->y);
00417                                                         fclose(fp);
00418                                                 }
00419                                         }                                       
00420                                 }
00421                                 break;
00422                         case ID_BUTTON_LOAD:
00423                                 {
00424                                         char filename[1024];
00425                                         if(getfilename(hwnd,filename,1024,0))                                   
00426                                         {
00427                                                 FILE *fp = fopen(filename,"r");
00428                                                 if(fp)
00429                                                 {
00430                                                         clear_all();
00431                                                         char buf[4096];
00432                                                         while(fgets(buf,sizeof(buf),fp))
00433                                                         {
00434                                                                 int v;
00435                                                                 double x,y;
00436                                                                 if(sscanf(buf,"%d%*d:%lf%*d:%lf",&v,&x,&y)!=3)
00437                                                                         break;
00438                                                                 point p = {x,y,v};
00439                                                                 point_list.push_back(p);
00440                                                         }
00441                                                         fclose(fp);
00442                                                         draw_all_points();
00443                                                 }
00444                                         }
00445                                 }
00446                                 break;
00447                         }
00448                 }
00449                 return 0;
00450         case WM_DESTROY:
00451                 PostQuitMessage(0);
00452                 return 0;
00453         }
00454 
00455         return DefWindowProc(hwnd, iMsg, wParam, lParam);
00456 }


libsvm3
Author(s): various
autogenerated on Wed Nov 27 2013 11:36:23