python - Python pandas datetime plot xticks不在偶数间隙中

Question

使用 Python 3.7、Jupytermatplotlib 3.0.1、pandas 0.23.4（全部更新）时，pandas 日期图（datetime64 系列）的 xticks 出现了奇怪的空白。我怎样才能使间隙均匀？

import pandas as pd
import matplotlib.pyplot as plt
x = pd.date_range(start='1/1/2018', periods=80) # 80 days
y = pd.np.random.random(80)
plt.plot(x, y ,'o')
plt.xticks(rotation='vertical') 

标签： pythonpandasmatplotlibjupyter-notebook

Answer 1

您可以使用WeekdayLocator “强制”刻度的位置：

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

x = pd.date_range(start='1/1/2018', periods=80) # 80 days
y = np.random.random(80)
fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot(x, y ,'o')
plt.xticks(rotation='vertical')
ax.xaxis.set_major_locator(mdates.WeekdayLocator(interval=1))
plt.show()