pandas 二次Y轴用于箱线图 [英] Pandas secondary y axis for boxplots
问题描述
我想在熊猫的一些箱形图中使用辅助y轴,但似乎不可用。
I'd like to use a secondary y-axis for some boxplots in pandas, but it doesn't seem available.
import numpy as np
import pandas as pd
data = np.random.random((10, 5))
data[:,-1] += 10 # offset one column
df = pd.DataFrame(data)
现在,使用默认线图可以很容易地绘制到第二个y轴:
Now, using the default line plot it's easy enough to plot to a second y-axis:
df.plot(kind='line', secondary_y=[4])
但是如果我使用boxplot样式,则不起作用:
But if I use boxplot style, it doesn't work:
df.plot(kind='box', secondary_y=[4])
有什么办法(也许通过matplotlib)我可以让熊猫为箱线图绘制2个轴吗?最好使用 boxplot()
方法,但我将采用 plot()
。谢谢。
Is there any way (maybe through matplotlib) I can get pandas to plot 2 axes for boxplot? Using the boxplot()
method would be preferable, but I'll take plot()
. Thanks.
推荐答案
实际上,使用matplotlib并不难。
Actually not that hard with matplotlib.
In [22]: fig, ax = plt.subplots()
In [23]: df[[0, 1, 2, 3]].plot(kind='box', ax=ax)
Out[23]: <matplotlib.axes._subplots.AxesSubplot at 0x4890978>
In [24]: ax2 = ax.twinx()
In [25]: ax2.boxplot(df[4], positions=[4])
In [27]: ax.set_xlim(0, 5)
Out[27]: (0, 5)
样式,刻度标签等仍有一些清理工作。但这应该可以帮助您开始。
There's still some cleanup with the styling, ticklabels etc. But that should get you started.
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