Pandas 部分子图为空白或显示不正确

Question

我正在尝试使用 Pandas DataFrame 创建子图，但其中一些是空白的并且显示不正确。我不知道我在哪里犯了错误。 Pandas Data Reader 从FRED接收数据时有时会报错，当我在此类报错中将subplots转换为seaborn散点图时，问题解决，但我需要的是线图。在这种情况下我该怎么办？谢谢。

import matplotlib.pyplot as plt 
import seaborn as sns 
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(['FDHBFRBN', 
                      'FDHBFIN',
                      'FYGFDPUN',
                      'FRDGBSAM',
                      'HBFRGDQ188S',
                      'MTSMFBP133FMS',
                      'GFDEGDQ188S',
                      'GFDEBTN',
                      'FYFSD',
                      'FYFSGDA188S'], 'fred', start, end)
df.columns = ['Federal Debt Held by Federal Reserve Banks',
              'Federal Debt Held by Foreign and International Investors', 
              'Federal Debt Held by the Public ',
              'Federal Reserve Bank Held Gold Bullion: On Display',
              'Federal Debt Held by Federal Reserve Banks as Percent of Gross Domestic Product',
              'Means of Financing: Borrowing from the Public',
              'Federal Debt: Total Public Debt',
              'Federal Debt: Total Public Debt',
              'Federal Surplus or Deficit',
              'Federal Surplus or Deficit [-] as Percent of Gross Domestic Product']
axes = df.plot(subplots=True, layout=(5,2), figsize=(15,25), linewidth=2, colormap="summer")
for (ax,), col in zip(axes, df.columns):
    ax.axvspan('2007-1-12', '2009-6-1', color='teal', 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)
    
axes[0,0].set_title('Federal Debt Held by Federal Reserve Banks')
axes[0,0].set_ylabel('Billions of Dollars(Quarterly)')
axes[0,0].legend(bbox_to_anchor=(1.05, 1))

axes[0,1].set_title('Federal Debt Held by Foreign and International Investors')
axes[0,1].set_ylabel('Billions of Dollars(Quarterly)')
axes[0,1].legend(bbox_to_anchor=(1.05, 1))

axes[1,0].set_title('Federal Debt Held by the Public ')
axes[1,0].set_ylabel('Millions of Dollars(Quarterly)')
axes[1,0].legend(bbox_to_anchor=(1.05, 1))

axes[1,1].set_title('Federal Reserve Bank Held Gold Bullion: On Display ')
axes[1,1].set_ylabel('Fine Troy Ounces(Monthly)')
axes[1,1].legend(bbox_to_anchor=(1.05, 1))

axes[2,0].set_title('Federal Debt Held by Federal Reserve Banks as Percent of Gross Domestic Product')
axes[2,0].set_ylabel('Percent of GDP(Quarterly)')
axes[2,0].legend(bbox_to_anchor=(1.05, 1))

axes[2,1].set_title('Means of Financing: Borrowing from the Public')
axes[2,1].set_ylabel('Millions of Dollars(Monthly)')
axes[2,1].legend(bbox_to_anchor=(1.05, 1))

axes[3,0].set_title('Federal Debt: Total Public Debt as Percent of Gross Domestic Product ')
axes[3,0].set_ylabel('Percent of GDP(Quarterly)')
axes[3,0].legend(bbox_to_anchor=(1.05, 1))

axes[3,1].set_title('Federal Debt: Total Public Debt')
axes[3,1].set_ylabel('Millions of Dollars(Qaurterly)')
axes[3,1].legend(bbox_to_anchor=(1.05, 1))

axes[4,0].set_title('Federal Surplus or Deficit')
axes[4,0].set_ylabel('Billions of Dollars(Annual)')
axes[4,0].legend(bbox_to_anchor=(1.05, 1))

axes[4,1].set_title('Federal Surplus or Deficit [-] as Percent of Gross Domestic Product')
axes[4,1].set_ylabel('Percent of GDP(Annual)')
axes[4,1].legend(bbox_to_anchor=(1.05, 1))


ax.set_title("US Reserves")
plt.xlabel('Date')
plt.tight_layout()
plt.style.use('seaborn-whitegrid')
plt.rcParams.update({'font.family':'Latin Modern Sans'})

Answer 1

你的 for 循环应该是这样的。

for ax, col in zip(axes.flatten(), df.columns):
   ...

您需要将 axes 网格展平，使其成为一维，否则 zip 功能将无法正常工作，因此出现空白图。

Pandas 部分子图为空白或显示不正确

Some of Pandas subplots is blank or not displayed correctly

matplotlib

dataframe

pandas

seaborn

pandas-datareader