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import matplotlib.pyplot as plt
# Create the figure
plt.figure(1, figsize=(4, 4))
ax = plt.subplot(111)
# Create the points
ax.plot(
[0, 0, 1, 0, 1, 2, 3, 2, 1, 0], [0, 1, 0, 2, 1, 0, 0, 1, 2, 3], "o", markersize=9
)
# Create the arrows
ax.annotate(
"",
xy=(0.97, 0),
xycoords="data",
xytext=(0, 0),
textcoords="data",
arrowprops=dict(
arrowstyle="-|>",
linestyle="dashed",
mutation_scale=15,
connectionstyle="arc3",
color="black",
),
)
ax.arrow(
1,
0,
-0.97,
0.97,
head_width=0.08,
head_length=0.08,
fc="k",
ec="k",
length_includes_head=True,
linestyle="dashed",
)
ax.arrow(
0,
1,
1.97,
-0.97,
head_width=0.08,
head_length=0.08,
fc="k",
ec="k",
length_includes_head=True,
linestyle="dashed",
)
ax.arrow(
2,
0,
-1.97,
1.97,
head_width=0.08,
head_length=0.08,
fc="k",
ec="k",
length_includes_head=True,
linestyle="dashed",
)
ax.arrow(
0,
2,
2.97,
-1.97,
head_width=0.08,
head_length=0.08,
fc="k",
ec="k",
length_includes_head=True,
linestyle="dashed",
)
ax.arrow(
3,
0,
-2.97,
2.97,
head_width=0.08,
head_length=0.08,
fc="k",
ec="k",
length_includes_head=True,
linestyle="dashed",
)
ax.arrow(
0,
3,
1.97,
-0.97,
head_width=0.08,
head_length=0.08,
fc="k",
ec="k",
length_includes_head=True,
linestyle="dashed",
)
# Annotate points
ax.annotate(
"4",
xy=(1, 1),
xycoords="data",
xytext=(-20, -5),
textcoords="offset points",
fontsize=16,
)
ax.annotate(
"7",
xy=(2, 1),
xycoords="data",
xytext=(+15, +0),
textcoords="offset points",
fontsize=16,
)
ax.annotate(
"8",
xy=(1, 2),
xycoords="data",
xytext=(+15, +0),
textcoords="offset points",
fontsize=16,
)
# Add labels
ax.annotate(
r"$\tau_1$",
xy=(1, 0),
xytext=(10, 10),
ha="left",
va="center",
xycoords="axes fraction",
textcoords="offset points",
fontsize=20,
)
ax.annotate(
r"$\tau_2$",
xy=(0, 1),
xytext=(0, 10),
ha="left",
va="center",
xycoords="axes fraction",
textcoords="offset points",
fontsize=20,
)
# Hide spines
ax.spines["right"].set_color("none")
ax.spines["top"].set_color("none")
# Set spines's position
ax.xaxis.set_ticks_position("bottom")
ax.spines["bottom"].set_position(("data", 0))
ax.yaxis.set_ticks_position("left")
ax.spines["left"].set_position(("data", 0))
# Add labels
plt.xticks([-0.1] + list(range(4)) + [3.2])
ax.set_xticklabels(("", "$0$", "$1$", "$3$", "$6$", ""), fontsize=20)
plt.yticks([-0.1] + list(range(4)) + [3.2])
ax.set_yticklabels(("", "", "$2$", "$5$", "$9$", ""), fontsize=20)
# Show the figure
plt.show()
|
