title: Matplotlib add subtitle to figure
body: <p>I want to add a title to my figure that contains several subplots. </p>
  
  <p>Here is my code:</p>
  
  <pre><code>    import matplotlib.pyplot as plt 
  
      plt.figure(figsize = (15, 80))
      for i, audio, rate, name in zip(range(len(audios)), audios, rates, names):
          plt.subplot(len(audios), 1, i+1)
          plt.plot(rate, audio)
          plt.xlabel('Time (s)')
          plt.ylabel('Amplitude')
          plt.title(name)
      plt.subtitle('Figure 1: Plot amplitude of signal')
      plt.show()
  </code></pre>
  
  <p>The error I get is : <code>module 'matplotlib.pyplot' has no attribute 'subtitle'</code>
  I can't figure out why this doesn't work since it is written that way in the matplotlib documentation ! Thank you for your help.</p>