marplotlib16.坐标走更改刻度，日期

1.更改刻度

import matplotlib.pyplot as plt
import numpy as np
import matplotlib.pyplot as plt
import numpy as np
x = np.arange(1,11,1)
plt.plot(x,x)
ax = plt.gca()
ax.locator_params('y',nbins=20,
                  # 'x',nbins=20,
                  )
plt.show()

　　

2.更改日期

import matplotlib.pyplot as plt
import matplotlib as mp1
import numpy as np
import datetime
import time
fig = plt.figure()
star = datetime.datetime(2015,1,1)
stop = datetime.datetime(2016,1,1)
delta = datetime.timedelta(days=1)

dates = mp1.dates.drange(star,stop,delta)

y = np.random.rand(len(dates))

ax = plt.gca()

ax.plot_date(dates,y,linestyle='-',marker='')
date_format = mp1.dates.DateFormatter('%Y-%m')
ax.xaxis.set_major_formatter(date_format)

plt.show()