| """ |
| =============== |
| Patheffect Demo |
| =============== |
| |
| """ |
| import matplotlib.pyplot as plt |
| import numpy as np |
|
|
| from matplotlib import patheffects |
|
|
| fig, (ax1, ax2, ax3) = plt.subplots(1, 3, figsize=(8, 3)) |
| ax1.imshow([[1, 2], [2, 3]]) |
| txt = ax1.annotate("test", (1., 1.), (0., 0), |
| arrowprops=dict(arrowstyle="->", |
| connectionstyle="angle3", lw=2), |
| size=20, ha="center", |
| path_effects=[patheffects.withStroke(linewidth=3, |
| foreground="w")]) |
| txt.arrow_patch.set_path_effects([ |
| patheffects.Stroke(linewidth=5, foreground="w"), |
| patheffects.Normal()]) |
|
|
| pe = [patheffects.withStroke(linewidth=3, |
| foreground="w")] |
| ax1.grid(True, linestyle="-", path_effects=pe) |
|
|
| arr = np.arange(25).reshape((5, 5)) |
| ax2.imshow(arr) |
| cntr = ax2.contour(arr, colors="k") |
|
|
| cntr.set(path_effects=[patheffects.withStroke(linewidth=3, foreground="w")]) |
|
|
| clbls = ax2.clabel(cntr, fmt="%2.0f", use_clabeltext=True) |
| plt.setp(clbls, path_effects=[ |
| patheffects.withStroke(linewidth=3, foreground="w")]) |
|
|
| |
| p1, = ax3.plot([0, 1], [0, 1]) |
| leg = ax3.legend([p1], ["Line 1"], fancybox=True, loc='upper left') |
| leg.legendPatch.set_path_effects([patheffects.withSimplePatchShadow()]) |
|
|
| plt.show() |
|
|
