python matplotlib 绘图线条类型和颜色选择

发布时间：2023-04-07 15:13:22 所属栏目：教程来源：

导读：import numpy as np
import matplotlib.pyplot as plt
linestyle_str = [
('solid', 'solid'), # Same as (0, ()) or '-'
('dotted', 'dotted'), #

import numpy as np
import matplotlib.pyplot as plt
linestyle_str = [
('solid', 'solid'), # Same as (0, ()) or '-'
('dotted', 'dotted'), # Same as (0, (1, 1)) or '.'
('dashed', 'dashed'), # Same as '--'
('dashdot', 'dashdot')] # Same as '-.'
linestyle_tuple = [
('loosely dotted', (0, (1, 10))),
('dotted', (0, (1, 1))),
('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))),
('dashdotdotted', (0, (3, 5, 1, 5, 1, 5))),
('loosely dashdotdotted', (0, (3, 10, 1, 10, 1, 10))),
('densely dashdotdotted', (0, (3, 1, 1, 1, 1, 1)))]
def plot_linestyles(ax, linestyles):
X, Y = np.linspace(0, 100, 10), np.zeros(10)
yticklabels = []
for i, (name, linestyle) in enumerate(linestyles):
ax.plot(X, Y+i, linestyle=linestyle, linewidth=1.5, color='black')
yticklabels.append(name)
ax.set(xticks=[], ylim=(-0.5, len(linestyles)-0.5),
yticks=np.arange(len(linestyles)), yticklabels=yticklabels)
# 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).
for i, (name, linestyle) in enumerate(linestyles):
ax.annotate(repr(linestyle),
xy=(0.0, i), xycoords=ax.get_yaxis_transform(),
xytext=(-6, -12), textcoords='offset points',
color="blue", fontsize=8, ha="right", family="monospace")
fig, (ax0, ax1) = plt.subplots(2, 1, gridspec_kw={'height_ratios': [1, 3]},
figsize=(10, 8))
plot_linestyles(ax0, linestyle_str[::-1])
plot_linestyles(ax1, linestyle_tuple[::-1])
plt.tight_layout()
plt.show()

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