如何清理 x 轴？

Question

I have tried plt.gcf().autofmt_xdate() but that doesn't fix the overlapping dates on the x axis. How do I clean the x axis to every week instead of everyday?

# Convert string column into date
df['date'] = pd.to_datetime(df['date'], format = "%Y-%m-%d")

plt.figure(figsize=(14,10))
plt.title("Daily Tests")
plt.ylabel("Number of confirmed cases")
plt.xlabel("Date")
sns.barplot(x=df['date'], y=df['confirmed'])
plt.show()

The graph:

any suggestions would be appreciated.

Answer 1

Set the interval of mdates.DayLocator(interval=14) in order to control the time series data of x-axis. In this case, it is set to two weeks.

import matplotlib.pyplot as plt
import matplotlib.dates as mdates

fig = plt.figure(figsize=(14,10))
ax = fig.add_subplot(111)

sns.barplot(x=df['date'], y=df['confirmed'], ax=ax)

ax.set_title("Daily Tests")
ax.set_ylabel("Number of confirmed cases")
ax.set_xlabel("Date")

days = mdates.DayLocator(interval=14)
days_fmt = mdates.DateFormatter('%m-%d')
ax.xaxis.set_major_locator(days)
ax.xaxis.set_major_formatter(days_fmt)

plt.show()