doc/info/figures/draw_region.mac

   1 load("docdraw.mac");
   2
   3 docdraw2d("figures/draw_region",
   4         x_voxel = 30,
   5         y_voxel = 30,
   6         region(x^2+y^2<1 and x^2+y^2 > 1/2,
   7         x, -1.5, 1.5, y, -1.5, 1.5));