title: python pandas DataFrame subplot in columns and rows
body: <p>I would like to produce a subplot from data 4-column DataFrame into 2-rows and 2-columns.</p>
  <pre><code>df = pd.DataFrame(np.random.randn(6,4),index=pd.date_range('1/1/2000',periods=6, freq='1h'))
  </code></pre>
  <p>However, below will give a 4-row and 1-column plot</p>
  <pre><code>df.plot(use_index=False, title=f, subplots=True, sharey=True, figsize=(8, 6))
  </code></pre>