用熊猫重新采样的时间序列数据填充matplotlib中的条形图空白

Question

I have some code like the follwoing MWE:

import matplotlib.pyplot as plt
import pandas as pd
from pandas_datareader import data

test_df = data.get_data_yahoo('AAPL', start='2015-10-01')
test_df = test_df.resample('W', how='sum')['Volume']
fig, ax = plt.subplots()
ax.bar(test_df.index, test_df, edgecolor='None')

Which results in a plot like this:

How can I make the bars span the axis so there are no gaps between them?

Answer 1

Use the width keyword argument. Since you're doing a weekly resample, setting width=7 should do the job.

ax.bar(test_df.index, test_df, edgecolor='None', width=7)