线的样式

这个例子展示了复制Tikz / PGF的不同线条样式。

线的样式图示

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import numpy as np
import matplotlib.pyplot as plt
from collections import OrderedDict
from matplotlib.transforms import blended_transform_factory

linestyles = OrderedDict(
    [('solid',               (0, ())),
     ('loosely dotted',      (0, (1, 10))),
     ('dotted',              (0, (1, 5))),
     ('densely dotted',      (0, (1, 1))),

     ('loosely dashed',      (0, (5, 10))),
     ('dashed',              (0, (5, 5))),
     ('densely dashed',      (0, (5, 1))),

     ('loosely dashdotted',  (0, (3, 10, 1, 10))),
     ('dashdotted',          (0, (3, 5, 1, 5))),
     ('densely dashdotted',  (0, (3, 1, 1, 1))),

     ('loosely dashdotdotted', (0, (3, 10, 1, 10, 1, 10))),
     ('dashdotdotted',         (0, (3, 5, 1, 5, 1, 5))),
     ('densely dashdotdotted', (0, (3, 1, 1, 1, 1, 1)))])


plt.figure(figsize=(10, 6))
ax = plt.subplot(1, 1, 1)

X, Y = np.linspace(0, 100, 10), np.zeros(10)
for i, (name, linestyle) in enumerate(linestyles.items()):
    ax.plot(X, Y+i, linestyle=linestyle, linewidth=1.5, color='black')

ax.set_ylim(-0.5, len(linestyles)-0.5)
plt.yticks(np.arange(len(linestyles)), linestyles.keys())
plt.xticks([])

# For each line style, add a text annotation with a small offset from
# the reference point (0 in Axes coords, y tick value in Data coords).
reference_transform = blended_transform_factory(ax.transAxes, ax.transData)
for i, (name, linestyle) in enumerate(linestyles.items()):
    ax.annotate(str(linestyle), xy=(0.0, i), xycoords=reference_transform,
                xytext=(-6, -12), textcoords='offset points', color="blue",
                fontsize=8, ha="right", family="monospace")

plt.tight_layout()
plt.show()

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