title: Matplotlib not displaying figures
body: <p>This must be a really basic question: I am trying to use Matplotlib. Here's the basic example from the <a href="http://matplotlib.sourceforge.net/api/pyplot_api.html" rel="noreferrer">documentation</a>.</p>
  
  <pre><code>import numpy as np
  import matplotlib.pyplot as plt
  x = np.arange(0,5,0.1)
  y = np.sin(x)
  plt.plot(x,y)
  </code></pre>
  
  <p>I have tried this in <code>ipython</code>, <code>bpython</code> and the default interpreter (Ubuntu 10.10, 64 bit) and all I get are messages like:</p>
  
  <pre><code>[&lt;matplotlib.lines.Line2D object at 0x3f14a90&gt;]
  </code></pre>
  
  <p>What am I doing wrong?</p>