title: plot() doesn't work on IPython notebook
body: <p>I'm new to python scientific computing, and I tried to make a simple graph on IPython notebook.</p>
  
  <pre><code>import pandas
  plot(arange(10))
  </code></pre>
  
  <p>Then error had shown as below.</p>
  
  <pre><code>---------------------------------------------------------------------------
  NameError                                 Traceback (most recent call last)
  &lt;ipython-input-2-6b139d572bd6&gt; in &lt;module&gt;()
        1 import pandas
  ----&gt; 2 plot(arange(10))
  
  NameError: name 'plot' is not defined
  </code></pre>
  
  <p>Instead, with IPython --pylab mode, a right graph popped up when I tried the same code.</p>
  
  <p>Am I missing any environment?</p>
  
  <p>My environment is Mac OSX 10.8.5, python 2.7.5, IPython 1.1.0, matplotlib 1.3.1, and pandas 0.12.0. I downloaded python scientific environment by Anaconda installer from continuum.io. Anaconda version is the newest one as of 1/30/2014.</p>