修补效果演示

修补效果演示

  1. import matplotlib.pyplot as plt
  2. import matplotlib.patheffects as PathEffects
  3. import numpy as np
  5. if 1:
  6.     plt.figure(1, figsize=(8, 3))
  7.     ax1 = plt.subplot(131)
  8.     ax1.imshow([[1, 2], [2, 3]])
  9.     txt = ax1.annotate("test", (1., 1.), (0., 0),
  10.                        arrowprops=dict(arrowstyle="->",
  11.                                        connectionstyle="angle3", lw=2),
  12.                        size=20, ha="center",
  13.                        path_effects=[PathEffects.withStroke(linewidth=3,
  14.                                                             foreground="w")])
  15.     txt.arrow_patch.set_path_effects([
  16.         PathEffects.Stroke(linewidth=5, foreground="w"),
  17.         PathEffects.Normal()])
  19.     pe = [PathEffects.withStroke(linewidth=3,
  20.                                  foreground="w")]
  21.     ax1.grid(True, linestyle="-", path_effects=pe)
  23.     ax2 = plt.subplot(132)
  24.     arr = np.arange(25).reshape((5, 5))
  25.     ax2.imshow(arr)
  26.     cntr = ax2.contour(arr, colors="k")
  28.     plt.setp(cntr.collections, path_effects=[
  29.         PathEffects.withStroke(linewidth=3, foreground="w")])
  31.     clbls = ax2.clabel(cntr, fmt="%2.0f", use_clabeltext=True)
  32.     plt.setp(clbls, path_effects=[
  33.         PathEffects.withStroke(linewidth=3, foreground="w")])
  35.     # shadow as a path effect
  36.     ax3 = plt.subplot(133)
  37.     p1, = ax3.plot([0, 1], [0, 1])
  38.     leg = ax3.legend([p1], ["Line 1"], fancybox=True, loc='upper left')
  39.     leg.legendPatch.set_path_effects([PathEffects.withSimplePatchShadow()])
  41.     plt.show()

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