1*c4762a1bSJed Brown 2*c4762a1bSJed Brown static char help[] = "Makes a simple histogram.\n"; 3*c4762a1bSJed Brown 4*c4762a1bSJed Brown #include <petscsys.h> 5*c4762a1bSJed Brown #include <petscdraw.h> 6*c4762a1bSJed Brown 7*c4762a1bSJed Brown int main(int argc,char **argv) 8*c4762a1bSJed Brown { 9*c4762a1bSJed Brown PetscDraw draw; 10*c4762a1bSJed Brown PetscDrawHG hist; 11*c4762a1bSJed Brown PetscDrawAxis axis; 12*c4762a1bSJed Brown PetscErrorCode ierr; 13*c4762a1bSJed Brown int n = 20,i,x = 0,y = 0,width = 400,height = 300,bins = 8; 14*c4762a1bSJed Brown PetscInt w = 400,h = 300,nn = 20,b = 8,c = PETSC_DRAW_GREEN; 15*c4762a1bSJed Brown int color = PETSC_DRAW_GREEN; 16*c4762a1bSJed Brown const char *xlabel,*ylabel,*toplabel; 17*c4762a1bSJed Brown PetscReal xd; 18*c4762a1bSJed Brown PetscBool flg; 19*c4762a1bSJed Brown 20*c4762a1bSJed Brown xlabel = "X-axis Label"; toplabel = "Top Label"; ylabel = "Y-axis Label"; 21*c4762a1bSJed Brown 22*c4762a1bSJed Brown ierr = PetscInitialize(&argc,&argv,NULL,help);if (ierr) return ierr; 23*c4762a1bSJed Brown ierr = PetscOptionsGetInt(NULL,NULL,"-width",&w,NULL);CHKERRQ(ierr); 24*c4762a1bSJed Brown ierr = PetscOptionsGetInt(NULL,NULL,"-height",&h,NULL);CHKERRQ(ierr); 25*c4762a1bSJed Brown ierr = PetscOptionsGetInt(NULL,NULL,"-n",&nn,NULL);CHKERRQ(ierr); 26*c4762a1bSJed Brown ierr = PetscOptionsGetInt(NULL,NULL,"-bins",&b,NULL);CHKERRQ(ierr); 27*c4762a1bSJed Brown ierr = PetscOptionsGetInt(NULL,NULL,"-color",&c,NULL);CHKERRQ(ierr); 28*c4762a1bSJed Brown ierr = PetscOptionsHasName(NULL,NULL,"-nolabels",&flg);CHKERRQ(ierr); 29*c4762a1bSJed Brown width = (int) w; height = (int)h; n = (int)nn; bins = (int) b; color = (int) c; 30*c4762a1bSJed Brown if (flg) { xlabel = NULL; ylabel = NULL; toplabel = NULL; } 31*c4762a1bSJed Brown 32*c4762a1bSJed Brown ierr = PetscDrawCreate(PETSC_COMM_WORLD,0,"Title",x,y,width,height,&draw);CHKERRQ(ierr); 33*c4762a1bSJed Brown ierr = PetscDrawSetFromOptions(draw);CHKERRQ(ierr); 34*c4762a1bSJed Brown ierr = PetscDrawHGCreate(draw,bins,&hist);CHKERRQ(ierr); 35*c4762a1bSJed Brown ierr = PetscDrawHGSetColor(hist,color);CHKERRQ(ierr); 36*c4762a1bSJed Brown ierr = PetscDrawHGGetAxis(hist,&axis);CHKERRQ(ierr); 37*c4762a1bSJed Brown ierr = PetscDrawAxisSetColors(axis,PETSC_DRAW_BLACK,PETSC_DRAW_RED,PETSC_DRAW_BLUE);CHKERRQ(ierr); 38*c4762a1bSJed Brown ierr = PetscDrawAxisSetLabels(axis,toplabel,xlabel,ylabel);CHKERRQ(ierr); 39*c4762a1bSJed Brown /*ierr = PetscDrawHGSetFromOptions(hist);CHKERRQ(ierr);*/ 40*c4762a1bSJed Brown 41*c4762a1bSJed Brown for (i=0; i<n; i++) { 42*c4762a1bSJed Brown xd = (PetscReal)(i - 5); 43*c4762a1bSJed Brown ierr = PetscDrawHGAddValue(hist,xd*xd);CHKERRQ(ierr); 44*c4762a1bSJed Brown } 45*c4762a1bSJed Brown ierr = PetscDrawHGDraw(hist);CHKERRQ(ierr); 46*c4762a1bSJed Brown ierr = PetscDrawHGSave(hist);CHKERRQ(ierr); 47*c4762a1bSJed Brown 48*c4762a1bSJed Brown ierr = PetscDrawHGDestroy(&hist);CHKERRQ(ierr); 49*c4762a1bSJed Brown ierr = PetscDrawDestroy(&draw);CHKERRQ(ierr); 50*c4762a1bSJed Brown ierr = PetscFinalize(); 51*c4762a1bSJed Brown return ierr; 52*c4762a1bSJed Brown } 53*c4762a1bSJed Brown 54*c4762a1bSJed Brown 55*c4762a1bSJed Brown 56*c4762a1bSJed Brown /*TEST 57*c4762a1bSJed Brown 58*c4762a1bSJed Brown build: 59*c4762a1bSJed Brown requires: x 60*c4762a1bSJed Brown 61*c4762a1bSJed Brown test: 62*c4762a1bSJed Brown output_file: output/ex1_1.out 63*c4762a1bSJed Brown 64*c4762a1bSJed Brown TEST*/ 65