演示锚定方向箭头

演示锚定方向箭头示例

  1. import matplotlib.pyplot as plt
  2. import numpy as np
  3. from mpl_toolkits.axes_grid1.anchored_artists import AnchoredDirectionArrows
  4. import matplotlib.font_manager as fm
  6. fig, ax = plt.subplots()
  7. ax.imshow(np.random.random((10, 10)))
  9. # Simple example
  10. simple_arrow = AnchoredDirectionArrows(ax.transAxes, 'X', 'Y')
  11. ax.add_artist(simple_arrow)
  13. # High contrast arrow
  14. high_contrast_part_1 = AnchoredDirectionArrows(
  15.                             ax.transAxes,
  16.                             '111', r'11$\overline{2}$',
  17.                             loc='upper right',
  18.                             arrow_props={'ec': 'w', 'fc': 'none', 'alpha': 1,
  19.                                          'lw': 2}
  20.                             )
  21. ax.add_artist(high_contrast_part_1)
  23. high_contrast_part_2 = AnchoredDirectionArrows(
  24.                             ax.transAxes,
  25.                             '111', r'11$\overline{2}$',
  26.                             loc='upper right',
  27.                             arrow_props={'ec': 'none', 'fc': 'k'},
  28.                             text_props={'ec': 'w', 'fc': 'k', 'lw': 0.4}
  29.                             )
  30. ax.add_artist(high_contrast_part_2)
  32. # Rotated arrow
  33. fontprops = fm.FontProperties(family='serif')
  35. roatated_arrow = AnchoredDirectionArrows(
  36.                     ax.transAxes,
  37.                     '30', '120',
  38.                     loc='center',
  39.                     color='w',
  40.                     angle=30,
  41.                     fontproperties=fontprops
  42.                     )
  43. ax.add_artist(roatated_arrow)
  45. # Altering arrow directions
  46. a1 = AnchoredDirectionArrows(
  47.         ax.transAxes, 'A', 'B', loc='lower center',
  48.         length=-0.15,
  49.         sep_x=0.03, sep_y=0.03,
  50.         color='r'
  51.     )
  52. ax.add_artist(a1)
  54. a2 = AnchoredDirectionArrows(
  55.         ax.transAxes, 'A', ' B', loc='lower left',
  56.         aspect_ratio=-1,
  57.         sep_x=0.01, sep_y=-0.02,
  58.         color='orange'
  59.         )
  60. ax.add_artist(a2)
  63. a3 = AnchoredDirectionArrows(
  64.         ax.transAxes, ' A', 'B', loc='lower right',
  65.         length=-0.15,
  66.         aspect_ratio=-1,
  67.         sep_y=-0.1, sep_x=0.04,
  68.         color='cyan'
  69.         )
  70. ax.add_artist(a3)
  72. plt.show()

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