【pylab 】日期横坐标

import numpy as np 
import matplotlib.ticker as mticker

import matplotlib.dates as mdates

import pylab as pl

import matplotlib.pyplot as plt

 

import datetime as dt

 

x = np.arange(1,16,1)
y = np.array([105,180,323,371,1291,840,1032,1220,1347,1921,2103,2345,3156,2987,2447])

date2_1 = dt.datetime(2020,1,23)

1. date2_2 = dt.datetime(2020,2,7)

delta2 = dt.timedelta(days=1)

dates2 = mdates.drange(date2_1, date2_2, delta2)

 

pl.plot(dates2 , y, 'b^-', label='Origin Line')

ax = pl.gca()

for label in ax.xaxis.get_ticklabels():

        label.set_rotation(90)

 

ax.xaxis.set_major_formatter(mdates.DateFormatter('%m-%d'))

ax.xaxis.set_major_locator(mdates.DayLocator())

pl.show()