演示日期Rrule

展示如何使用Rrule实例制作自定义日期自动收报机 - 这里我们在每5个复活节放置一个刻度线。

有关Rrules的帮助，请参阅https://dateutil.readthedocs.io/en/stable/

演示日期Rrule示例

  1. import matplotlib.pyplot as plt
  2. from matplotlib.dates import (YEARLY, DateFormatter,
  3.                               rrulewrapper, RRuleLocator, drange)
  4. import numpy as np
  5. import datetime
  7. # Fixing random state for reproducibility
  8. np.random.seed(19680801)
  11. # tick every 5th easter
  12. rule = rrulewrapper(YEARLY, byeaster=1, interval=5)
  13. loc = RRuleLocator(rule)
  14. formatter = DateFormatter('%m/%d/%y')
  15. date1 = datetime.date(1952, 1, 1)
  16. date2 = datetime.date(2004, 4, 12)
  17. delta = datetime.timedelta(days=100)
  19. dates = drange(date1, date2, delta)
  20. s = np.random.rand(len(dates))  # make up some random y values
  23. fig, ax = plt.subplots()
  24. plt.plot_date(dates, s)
  25. ax.xaxis.set_major_locator(loc)
  26. ax.xaxis.set_major_formatter(formatter)
  27. ax.xaxis.set_tick_params(rotation=30, labelsize=10)
  29. plt.show()

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