简单的Annotate01
import matplotlib.pyplot as plt
import matplotlib.patches as mpatches
fig, axs = plt.subplots(2, 4)
x1, y1 = 0.3, 0.3
x2, y2 = 0.7, 0.7
ax = axs.flat[0]
ax.plot([x1, x2], [y1, y2], "o")
ax.annotate("",
xy=(x1, y1), xycoords='data',
xytext=(x2, y2), textcoords='data',
arrowprops=dict(arrowstyle="->"))
ax.text(.05, .95, "A $->$ B", transform=ax.transAxes, ha="left", va="top")
ax = axs.flat[2]
ax.plot([x1, x2], [y1, y2], "o")
ax.annotate("",
xy=(x1, y1), xycoords='data',
xytext=(x2, y2), textcoords='data',
arrowprops=dict(arrowstyle="->", connectionstyle="arc3,rad=0.3",
shrinkB=5)
)
ax.text(.05, .95, "shrinkB=5", transform=ax.transAxes, ha="left", va="top")
ax = axs.flat[3]
ax.plot([x1, x2], [y1, y2], "o")
ax.annotate("",
xy=(x1, y1), xycoords='data',
xytext=(x2, y2), textcoords='data',
arrowprops=dict(arrowstyle="->", connectionstyle="arc3,rad=0.3"))
ax.text(.05, .95, "connectionstyle=arc3", transform=ax.transAxes, ha="left", va="top")
ax = axs.flat[4]
ax.plot([x1, x2], [y1, y2], "o")
el = mpatches.Ellipse((x1, y1), 0.3, 0.4, angle=30, alpha=0.5)
ax.add_artist(el)
ax.annotate("",
xy=(x1, y1), xycoords='data',
xytext=(x2, y2), textcoords='data',
arrowprops=dict(arrowstyle="->", connectionstyle="arc3,rad=0.2")
)
ax = axs.flat[5]
ax.plot([x1, x2], [y1, y2], "o")
el = mpatches.Ellipse((x1, y1), 0.3, 0.4, angle=30, alpha=0.5)
ax.add_artist(el)
ax.annotate("",
xy=(x1, y1), xycoords='data',
xytext=(x2, y2), textcoords='data',
arrowprops=dict(arrowstyle="->", connectionstyle="arc3,rad=0.2",
patchB=el)
)
ax.text(.05, .95, "patchB", transform=ax.transAxes, ha="left", va="top")
ax = axs.flat[6]
ax.plot([x1], [y1], "o")
ax.annotate("Test",
xy=(x1, y1), xycoords='data',
xytext=(x2, y2), textcoords='data',
ha="center", va="center",
bbox=dict(boxstyle="round", fc="w"),
arrowprops=dict(arrowstyle="->")
)
ax.text(.05, .95, "annotate", transform=ax.transAxes, ha="left", va="top")
ax = axs.flat[7]
ax.plot([x1], [y1], "o")
ax.annotate("Test",
xy=(x1, y1), xycoords='data',
xytext=(x2, y2), textcoords='data',
ha="center", va="center",
bbox=dict(boxstyle="round", fc="w", ),
arrowprops=dict(arrowstyle="->", relpos=(0., 0.))
)
ax.text(.05, .95, "relpos=(0,0)", transform=ax.transAxes, ha="left", va="top")
for ax in axs.flat:
ax.set(xlim=(0, 1), ylim=(0, 1), xticks=[], yticks=[], aspect=1)
plt.show()