title: AttributeError: 'function' object has no attribute 'add_subplot' when using matplotlib in ipython
body: <p>Hi, I was trying some code from WesMckinney's python data analysis book in ipython environment,which is built in anaconda. When I typed the simple code like </p>
  
  <pre><code>import matplotlib.pyplot as plt
  
  fig = plt.figure
  
  ax1 = fig.add_subplot(2,2,1)
  Traceback (most recent call last):
  
  File "&lt;ipython-input-9-559e30a6412a&gt;", line 1, in &lt;module&gt;
  ax1 = fig.add_subplot(2,2,1)
  
  AttributeError: 'function' object has no attribute 'add_subplot'
  </code></pre>
  
  <p>An AttributeError arose, but it's weird since anaconda is surely installed with <code>matplotlib</code> module. So Any suggestion? thank you.</p>