title: pandas.DataFrame.plot() not showing x axis after update
body: <pre><code>import pandas as pd
  import numpy as np
  
  import matplotlib.pyplot as plt
  %matplotlib inline
  plt.style.use('seaborn-white')
  </code></pre>
  
  <p>burndown dataframe:</p>
  
  <pre><code>                Forecast    Actual
  Baseline        11422       11422
  February 2018   11422       11325
  March 2018      11420       10717
  April 2018      11415       10272
  May 2018        11393       8771
  June 2018       11382       7750
  July 2018       10069       6940
  August 2018     6330        6038
  September 2018  6153        4998
  </code></pre>
  
  <p>used to produce chart with x axis by calling:</p>
  
  <pre><code>burndown_data.plot(figsize=(15,3),grid=True,title=title,marker='o')
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/S2REG.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/S2REG.png" alt="enter image description here"></a></p>
  
  <p>but after upgrading to newest pandas x axis is lost. How to fix this?</p>
  
  <p><a href="https://i.stack.imgur.com/KpsBz.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/KpsBz.png" alt="enter image description here"></a></p>
  
  <p>When I'm trying this approach:</p>
  
  <p><a href="https://stackoverflow.com/questions/32572419/matplotlib-not-showing-all-x-axis-data-frame-variable">Matplotlib:: Not Showing all x-axis data frame variable</a></p>
  
  <p>I have an error:
  <a href="https://i.stack.imgur.com/JWokT.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/JWokT.png" alt="enter image description here"></a></p>