1 2 static char help[] = "Makes a simple bar graph.\n"; 3 4 #include <petscsys.h> 5 #include <petscdraw.h> 6 7 int main(int argc, char **argv) 8 { 9 PetscDraw draw; 10 PetscDrawBar bar; 11 PetscDrawAxis axis; 12 int color = PETSC_DRAW_ROTATE; 13 const char *xlabel, *ylabel, *toplabel; 14 const PetscReal values[] = {.3, .5, .05, .11}; 15 const char *const labels[] = {"A", "B", "C", "D", NULL}; 16 PetscReal limits[2] = {0, 0.55}; 17 PetscInt nlimits = 2; 18 PetscBool nolabels, setlimits; 19 20 xlabel = "X-axis Label"; 21 toplabel = "Top Label"; 22 ylabel = "Y-axis Label"; 23 24 PetscFunctionBeginUser; 25 PetscCall(PetscInitialize(&argc, &argv, NULL, help)); 26 PetscCall(PetscOptionsHasName(NULL, NULL, "-nolabels", &nolabels)); 27 if (nolabels) { 28 xlabel = NULL; 29 ylabel = NULL; 30 toplabel = NULL; 31 } 32 PetscCall(PetscOptionsGetRealArray(NULL, NULL, "-limits", limits, &nlimits, &setlimits)); 33 34 PetscCall(PetscDrawCreate(PETSC_COMM_WORLD, NULL, "Title", PETSC_DECIDE, PETSC_DECIDE, 400, 300, &draw)); 35 PetscCall(PetscDrawSetFromOptions(draw)); 36 PetscCall(PetscDrawBarCreate(draw, &bar)); 37 38 PetscCall(PetscDrawBarGetAxis(bar, &axis)); 39 PetscCall(PetscDrawAxisSetColors(axis, PETSC_DRAW_BLACK, PETSC_DRAW_RED, PETSC_DRAW_BLUE)); 40 PetscCall(PetscDrawAxisSetLabels(axis, toplabel, xlabel, ylabel)); 41 PetscCall(PetscDrawBarSetColor(bar, color)); 42 PetscCall(PetscDrawBarSetFromOptions(bar)); 43 44 if (setlimits) PetscCall(PetscDrawBarSetLimits(bar, limits[0], limits[1])); 45 PetscCall(PetscDrawBarSetData(bar, 4, values, labels)); 46 PetscCall(PetscDrawBarDraw(bar)); 47 PetscCall(PetscDrawBarSave(bar)); 48 49 PetscCall(PetscDrawBarDestroy(&bar)); 50 PetscCall(PetscDrawDestroy(&draw)); 51 PetscCall(PetscFinalize()); 52 return 0; 53 } 54 55 /*TEST 56 57 build: 58 requires: x 59 60 test: 61 output_file: output/ex1_1.out 62 63 TEST*/ 64