>>> """
========================
Anchored Direction Arrow
========================
"""
... import matplotlib.pyplot as plt
... import numpy as np
... from mpl_toolkits.axes_grid1.anchored_artists import AnchoredDirectionArrows
... import matplotlib.font_manager as fm
...
...
... # Fixing random state for reproducibility
... np.random.seed(19680801)
...
... fig, ax = plt.subplots()
... ax.imshow(np.random.random((10, 10)))
...
... # Simple example
... simple_arrow = AnchoredDirectionArrows(ax.transAxes, 'X', 'Y')
... ax.add_artist(simple_arrow)
...
... # High contrast arrow
... high_contrast_part_1 = AnchoredDirectionArrows(
... ax.transAxes,
... '111', r'11$\overline{2}$',
... loc='upper right',
... arrow_props={'ec': 'w', 'fc': 'none', 'alpha': 1,
... 'lw': 2}
... )
... ax.add_artist(high_contrast_part_1)
...
... high_contrast_part_2 = AnchoredDirectionArrows(
... ax.transAxes,
... '111', r'11$\overline{2}$',
... loc='upper right',
... arrow_props={'ec': 'none', 'fc': 'k'},
... text_props={'ec': 'w', 'fc': 'k', 'lw': 0.4}
... )
... ax.add_artist(high_contrast_part_2)
...
... # Rotated arrow
... fontprops = fm.FontProperties(family='serif')
...
... roatated_arrow = AnchoredDirectionArrows(
... ax.transAxes,
... '30', '120',
... loc='center',
... color='w',
... angle=30,
... fontproperties=fontprops
... )
... ax.add_artist(roatated_arrow)
...
... # Altering arrow directions
... a1 = AnchoredDirectionArrows(
... ax.transAxes, 'A', 'B', loc='lower center',
... length=-0.15,
... sep_x=0.03, sep_y=0.03,
... color='r'
... )
... ax.add_artist(a1)
...
... a2 = AnchoredDirectionArrows(
... ax.transAxes, 'A', ' B', loc='lower left',
... aspect_ratio=-1,
... sep_x=0.01, sep_y=-0.02,
... color='orange'
... )
... ax.add_artist(a2)
...
...
... a3 = AnchoredDirectionArrows(
... ax.transAxes, ' A', 'B', loc='lower right',
... length=-0.15,
... aspect_ratio=-1,
... sep_y=-0.1, sep_x=0.04,
... color='cyan'
... )
... ax.add_artist(a3)
...
... plt.show()
...