title: pandas_datareader cant print date on x axis
body: <p>In following plot date is not showing on x axis what do to show date time stamp    </p>
  
  <pre><code>import  numpy as np
  import pandas as pd
  import  matplotlib.pyplot as plt
  import datetime
  import pandas_datareader as web
  start=datetime.datetime(2014,1,8)
  end =datetime.datetime(2019,1,8)
  Tesla=web.DataReader('TSLA',"iex",start,end)
  Ford=web.DataReader('F',"iex",start,end)
  Tesla["open"].plot(label="Tesla",title="opening Price",figsize=(16,8))
  plt.legend()
  plt.show()
  </code></pre>