python - 如何将axhline发送到Matplotlib的barplot的背面

我有以下代码。它使用Matplotlib wrapper in Pandas:

import pandas as pd
import io
import matplotlib
import matplotlib.pyplot as plt

test=u"""Cell,Value
Bcells,0.056304
DendriticCells,0.3155388
Macrophages,0.131430
"""

tableau10=[ "#17BECF", "#BCBD22", "#7F7F7F", ]

toplot_df = pd.read_csv(io.StringIO(test))
toplot_df.set_index('Cell',inplace=True)
xlabels =  toplot_df.index.values
barplot   = toplot_df.plot(kind="bar", figsize=(17,17), \
                          color = tableau10, \
                          width=0.7,\
                          fontsize = 30,\
                          legend=False,
                          ylim = (0,0.5),
                          subplots=False)

ax = plt.gca()
ax.set_xticklabels(xlabels, rotation=30, ha='right')

# How to to make this to the back
plt.axhline(y=0.1, linewidth=1, color='r',zorder=1)
plt.xlabel("")
plt.ylabel("Score", fontsize=30, fontweight="bold")

它使这个数字:



如那里所述。如何将axhline设置为背景？
我尝试了zorder，但无法正常工作。

最佳答案

您只需要使zorder的barplot高于zorder的axhline即可。在您的示例中，我只需要在zorder=2调用中添加barplot = toplot_df.plot()选项即可。

import pandas as pd
import io
import matplotlib
import matplotlib.pyplot as plt

test=u"""Cell,Value
Bcells,0.056304
DendriticCells,0.3155388
Macrophages,0.131430
"""

tableau10=[ "#17BECF", "#BCBD22", "#7F7F7F", ]

toplot_df = pd.read_csv(io.StringIO(test))
toplot_df.set_index('Cell',inplace=True)
xlabels =  toplot_df.index.values
barplot   = toplot_df.plot(kind="bar", figsize=(17,17), \
                          color = tableau10, \
                          width=0.7,\
                          fontsize = 30,\
                          legend=False,
                          ylim = (0,0.5),
                          subplots=False,
                          zorder=2)                         ##### This is all I added

ax = plt.gca()
ax.set_xticklabels(xlabels, rotation=30, ha='right')

# How to to make this to the back
plt.axhline(y=0.1, linewidth=1, color='r',zorder=1)
plt.xlabel("")
plt.ylabel("Score", fontsize=30, fontweight="bold")

plt.show()

关于python - 如何将axhline发送到Matplotlib的barplot的背面，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/37410614/