更改seaborn因子图中的线的alpha [英] Changing alpha of a line in seaborn factorplot

问题描述

import seaborn as sns
sns.set(style="ticks")
exercise = sns.load_dataset("exercise")
g = sns.factorplot(x="time", y="pulse", hue="kind", data=exercise)

在上面的代码中，如何将 rest 行更改为 0.5 的 alpha?

In the code above, how can I change the rest line to an alpha of 0.5?

推荐答案

使用 get_children() 方法找到 FacetGrid 轴的合适对象，并为线条和标记设置 alpha.要更改图例( g._legend 对象)中的标记属性，请找到 legendHandles 的合适元素，然后应用 set_alpha()方法:

Find proper objects of FacetGrid axes with get_children() method and set alpha for lines and markers. To change marker property in legend (g._legend object) find suitable element of legendHandles and apply set_alpha() method:

import seaborn as sns
import matplotlib.pylab as plt

sns.set(style="ticks")
exercise = sns.load_dataset("exercise")
g = sns.factorplot(x="time", y="pulse", hue="kind", data=exercise)

# set alpha for marker (index 0) and for the rest line (indeces 3-6) 
plt.setp([g.ax.get_children()[0],g.ax.get_children()[3:7]],alpha=.5)

# modify marker in legend box
g._legend.legendHandles[0].set_alpha(.5)

plt.show()

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