在mplstyle或matplotlibrc中设置boxplot参数

Question

There are numerous ways to change eg colors of boxplot elements. However, I prefer to set them for all my plots in a dedicated .mplstyle or in my matplotlibrc. Both methods appear to not change anything for boxplots, though.

Here is part of my own.mplstyle which should set the caps to yellow:

# Boxplots
boxplot.capprops.color: y
boxplot.capprops.linestyle: -
boxplot.capprops.linewidth: 1.0
boxplot.flierprops.color: y
boxplot.flierprops.linestyle: none
boxplot.flierprops.linewidth: 1.0
boxplot.flierprops.marker: x
boxplot.flierprops.markerfacecolor: auto

and part of my matplotlibrc which should set the caps to blue:

boxplot.capprops.color     : b
#boxplot.capprops.linewidth : 1.0
# boxplot.capprops.linestyle : -

however, the following code leads to black caps:

plt.style.use('own')
dataset.plot(kind='box')
plt.show()

figure:

also, is there a way to set cap size?

Answer 1

Pandas ignores the rc settings for boxplots. They work fine however for matplotlib boxplots.

import matplotlib.pyplot as plt
import numpy as np
import pandas as pd

plt.rcParams["boxplot.capprops.color"] = "red"

data = np.random.randn(20,5)
df = pd.DataFrame(data, columns=list("ABCDE"))

fig, (ax,ax2) = plt.subplots(ncols=2)
ax.set_title("matplotlib boxplot")
ax.boxplot(data)

ax2.set_title("pandas boxplot")
df.plot(kind="box", ax=ax2)

plt.show()