.. _api-donut_demo: api example code: donut_demo.py =============================== .. plot:: /home/mdboom/Work/builds/matplotlib/doc/mpl_examples/api/donut_demo.py :: import numpy as np import matplotlib.path as mpath import matplotlib.patches as mpatches import matplotlib.pyplot as plt def wise(v): if v == 1: return "CCW" else: return "CW" def make_circle(r): t = np.arange(0, np.pi * 2.0, 0.01) t = t.reshape((len(t), 1)) x = r * np.cos(t) y = r * np.sin(t) return np.hstack((x, y)) Path = mpath.Path fig, ax = plt.subplots() inside_vertices = make_circle(0.5) outside_vertices = make_circle(1.0) codes = np.ones(len(inside_vertices), dtype=mpath.Path.code_type) * mpath.Path.LINETO codes[0] = mpath.Path.MOVETO for i, (inside, outside) in enumerate(((1, 1), (1, -1), (-1, 1), (-1, -1))): # Concatenate the inside and outside subpaths together, changing their # order as needed vertices = np.concatenate((outside_vertices[::outside], inside_vertices[::inside])) # Shift the path vertices[:, 0] += i * 2.5 # The codes will be all "LINETO" commands, except for "MOVETO"s at the # beginning of each subpath all_codes = np.concatenate((codes, codes)) # Create the Path object path = mpath.Path(vertices, all_codes) # Add plot it patch = mpatches.PathPatch(path, facecolor='#885500', edgecolor='black') ax.add_patch(patch) ax.annotate("Outside %s,\nInside %s" % (wise(outside), wise(inside)), (i * 2.5, -1.5), va="top", ha="center") ax.set_xlim(-2,10) ax.set_ylim(-3,2) ax.set_title('Mmm, donuts!') ax.set_aspect(1.0) plt.show() Keywords: python, matplotlib, pylab, example, codex (see :ref:`how-to-search-examples`)