1 2 static char help[] = "Plots a simple line graph.\n"; 3 4 #if defined(PETSC_APPLE_FRAMEWORK) 5 #import <PETSc/petscsys.h> 6 #import <PETSc/petscdraw.h> 7 #else 8 9 #include <petscsys.h> 10 #include <petscdraw.h> 11 #endif 12 13 int main(int argc,char **argv) 14 { 15 PetscDraw draw; 16 PetscDrawLG lg; 17 PetscDrawAxis axis; 18 PetscInt n = 15,i,x = 0,y = 0,width = 400,height = 300,nports = 1; 19 PetscBool useports,flg; 20 const char *xlabel,*ylabel,*toplabel,*legend; 21 PetscReal xd,yd; 22 PetscDrawViewPorts *ports = NULL; 23 PetscErrorCode ierr; 24 25 toplabel = "Top Label"; xlabel = "X-axis Label"; ylabel = "Y-axis Label"; legend = "Legend"; 26 27 ierr = PetscInitialize(&argc,&argv,NULL,help);if (ierr) return ierr; 28 ierr = PetscOptionsGetInt(NULL,NULL,"-x",&x,NULL);CHKERRQ(ierr); 29 ierr = PetscOptionsGetInt(NULL,NULL,"-y",&y,NULL);CHKERRQ(ierr); 30 ierr = PetscOptionsGetInt(NULL,NULL,"-width",&width,NULL);CHKERRQ(ierr); 31 ierr = PetscOptionsGetInt(NULL,NULL,"-height",&height,NULL);CHKERRQ(ierr); 32 ierr = PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);CHKERRQ(ierr); 33 ierr = PetscOptionsGetInt(NULL,NULL,"-nports",&nports,&useports);CHKERRQ(ierr); 34 ierr = PetscOptionsHasName(NULL,NULL,"-nolegend",&flg);CHKERRQ(ierr); 35 if (flg) legend = NULL; 36 ierr = PetscOptionsHasName(NULL,NULL,"-notoplabel",&flg);CHKERRQ(ierr); 37 if (flg) toplabel = NULL; 38 ierr = PetscOptionsHasName(NULL,NULL,"-noxlabel",&flg);CHKERRQ(ierr); 39 if (flg) xlabel = NULL; 40 ierr = PetscOptionsHasName(NULL,NULL,"-noylabel",&flg);CHKERRQ(ierr); 41 if (flg) ylabel = NULL; 42 ierr = PetscOptionsHasName(NULL,NULL,"-nolabels",&flg);CHKERRQ(ierr); 43 if (flg) {toplabel = NULL; xlabel = NULL; ylabel = NULL;} 44 45 ierr = PetscDrawCreate(PETSC_COMM_WORLD,0,"Title",x,y,width,height,&draw);CHKERRQ(ierr); 46 ierr = PetscDrawSetFromOptions(draw);CHKERRQ(ierr); 47 if (useports) { 48 ierr = PetscDrawViewPortsCreate(draw,nports,&ports);CHKERRQ(ierr); 49 ierr = PetscDrawViewPortsSet(ports,0);CHKERRQ(ierr); 50 } 51 ierr = PetscDrawLGCreate(draw,1,&lg);CHKERRQ(ierr); 52 ierr = PetscDrawLGSetUseMarkers(lg,PETSC_TRUE);CHKERRQ(ierr); 53 ierr = PetscDrawLGGetAxis(lg,&axis);CHKERRQ(ierr); 54 ierr = PetscDrawAxisSetColors(axis,PETSC_DRAW_BLACK,PETSC_DRAW_RED,PETSC_DRAW_BLUE);CHKERRQ(ierr); 55 ierr = PetscDrawAxisSetLabels(axis,toplabel,xlabel,ylabel);CHKERRQ(ierr); 56 ierr = PetscDrawLGSetLegend(lg,&legend);CHKERRQ(ierr); 57 ierr = PetscDrawLGSetFromOptions(lg);CHKERRQ(ierr); 58 59 for (i=0; i<=n; i++) { 60 xd = (PetscReal)(i - 5); yd = xd*xd; 61 ierr = PetscDrawLGAddPoint(lg,&xd,&yd);CHKERRQ(ierr); 62 } 63 ierr = PetscDrawLGDraw(lg);CHKERRQ(ierr); 64 ierr = PetscDrawLGSave(lg);CHKERRQ(ierr); 65 66 ierr = PetscDrawViewPortsDestroy(ports);CHKERRQ(ierr); 67 ierr = PetscDrawLGDestroy(&lg);CHKERRQ(ierr); 68 ierr = PetscDrawDestroy(&draw);CHKERRQ(ierr); 69 ierr = PetscFinalize(); 70 return ierr; 71 } 72 73 /*TEST 74 75 build: 76 requires: x 77 78 test: 79 output_file: output/ex1_1.out 80 81 TEST*/ 82