此code记录横轴的时间表示

import numpy as np

import pandas as pd

import matplotlib.dates as mdates    

import matplotlib.pyplot as plt

plt.figure(11)

x = np.array([ datetime.fromtimestamp(s) for s in time_data ])

x = pd.to_datetime(x)

plt.gca().xaxis.set_major_formatter(mdates.DateFormatter('%H:%M'))#显示为小时和分钟

plt.gca().xaxis.set_major_locator(mdates.MinuteLocator(interval=150))#Minute也可以换成时间，天

plt.bar(x[:],data[:],width=0.0001,align='center')

plt.savefig('stats_time.eps',format = 'eps')

plt.show()