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