使用matplotlib在两行之间着色

j91ykkif 于 2021-08-20 发布在 Java

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我想使用axvspan（）函数来可视化我使用pandas datareader获得的 Dataframe 。但是，当我使用以下代码时，我看到一个错误，并且子图中没有阴影。我该怎么办？非常感谢。

import matplotlib.pyplot as plt
import pandas_datareader.data as pdr
import pandas as pd
import datetime
start = datetime.datetime (2000,1,1)
end = datetime.datetime (2021,5,1)
df  = pdr.DataReader(['WFRBSB50215', 'WFRBST01134','WFRBST01122', 'WFRBSN09139', 'WFRBSB50189', 'WFRBST01110','WFRBSB50191'],'fred',start, end)
df.columns = ['Share of Total Net Worth Held by the Bottom 50% (1st to 50th Wealth Percentiles)',
              'Share of Total Net Worth Held by the Top 1% (99th to 100th Wealth Percentiles)', 
              'Share of Corporate Equities and Mutual Fund Shares Helb By Top1%(99th to 100th Wealth Percentiles)', 
              'Share of Financial Assets Held by the 90th to 99th Wealth Percentiles',
              'Share of Total Assets Held by the Bottom 50% (1st to 50th Wealth Percentiles)',
              'Share of Real Estate Held by the Top 1% (99th to 100th Wealth Percentiles)',
              'Share of Real Estate Held by the Bottom %50(1st to 50th Wealth Percentiles)'
              ]
ax = df.plot(subplots=True, layout=(7,1), figsize=(15,15), linewidth=3.5, colormap="summer")
ax.axvspan('2007-1-12', '2009-6-1', color='c', alpha=0.5)
ax.axvspan('2019-12-1', '2020-2-1',color= 'orange', alpha=0.5)
plt.xlabel('Date')
ax[0,].set_title('Share of Total Net Worth Held by the Bottom 50%')
ax[0,].set_ylabel('Percent of Aggregate')
ax[1,].set_title('Share of Total Net Worth Held by the Top 1%')
ax[1,].set_ylabel('Percent of Aggregate')
ax[2,].set_title('Share of Corporate Equities and Mutual Fund Shares Helb By Top 1%')
ax[2,].set_ylabel('Percent of Aggregate')
ax[3,].set_title('Share of Financial Assets Held by the 90th to 99th Wealth Percentiles')
ax[3,].set_ylabel('Percent of Aggregate')
ax[4,].set_title('Share of Total Assets Held by the Bottom 50% ')
ax[4,].set_ylabel('Percent of Aggregate')
ax[5,].set_title('Share of Real Estate Held by the Top 1%')
ax[5,].set_ylabel('Percent of Aggregate')
ax[6,].set_title('Share of Real Estate Held by the Bottom %50')
ax[6,].set_ylabel('Percent of Aggregate')
plt.tight_layout()
plt.style.use('seaborn-white')
plt.show()

python pandas matplotlib pandas-datareader

来源：https://stackoverflow.com/questions/68329255/shading-between-two-lines-with-matplotlib

1条答案

按热度按时间

uemypmqf1#

尝试在所有子地块上循环并添加 axvspan 具体到 AxesSubplot 相反：

axes = df.plot(subplots=True, layout=(7, 1), figsize=(15, 15), linewidth=3.5,
               colormap="summer", ylabel='Percent of Aggregate', xlabel='Date')

for (ax,), col in zip(axes, df.columns):
    ax.axvspan('2007-1-12', '2009-6-1', color='c', alpha=0.5)
    ax.axvspan('2019-12-1', '2020-2-1', color='orange', alpha=0.5)
    ax.set_title(col)

plt.tight_layout()
plt.style.use('seaborn-white')
plt.show()

使用 ylabel 及 xlabel 夸尔斯 plot 还可以从中设置子批次标题 df.columns 而不是手动。

为添加图例 axvspan . 最简单的方法是为每个标签添加一个标签 axvspan 并在每次迭代结束时制作图例：

axes = df.plot(subplots=True, layout=(7, 1), figsize=(15, 15), linewidth=3.5,
               colormap="summer", ylabel='Percent of Aggregate', xlabel='Date',
               legend=False)

for (ax,), col in zip(axes, df.columns):
    ax.axvspan('2007-1-12', '2009-6-1', color='c', alpha=0.5,
               label='2008 Crisis')
    ax.axvspan('2019-12-1', '2020-2-1', color='orange', alpha=0.5,
               label='Pandemic')
    ax.set_title(col)
    ax.legend()

plt.style.use('seaborn-white')
plt.tight_layout()
plt.show()

或者，可以仅为危机制作一个图例：

fig, axes = plt.subplots(nrows=7, figsize=(15, 15))
df.plot(subplots=True, ax=axes, linewidth=3.5,
        colormap="summer", ylabel='Percent of Aggregate', xlabel='Date')

for ax, col in zip(axes, df.columns):
    ax.axvspan('2007-1-12', '2009-6-1', color='c', alpha=0.5,
               label='2008 Crisis')
    ax.axvspan('2019-12-1', '2020-2-1', color='orange', alpha=0.5,
               label='Pandemic')
    ax.set_title(col)

handles, labels = axes[-1].get_legend_handles_labels()

fig.legend(handles[-2:], labels[-2:], title='Crises',
           loc='lower left', ncol=2)

plt.style.use('seaborn-white')
plt.tight_layout()
plt.show()

^单个图例位于左下角。

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使用matplotlib在两行之间着色

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