title: how to do subplot histogram with different bins pandas?
body: <pre><code>x=pd.DataFrame(np.random.randn(400)) 
  fig, axs = plt.subplots(2, 2, sharey=True, tight_layout=True, figsize=(10,5)); 
  for idx in range(3):
      axs[idx].hist(x, bins=20)
      axs[idx].hist(x, bins=40)
      axs[idx].hist(x, bins=60)  
      axs[idx].hist(x, bins=100) 
  </code></pre>
  
  <p>when i run the code above; i recieve this error </p>
  
  <blockquote>
    <p>AttributeError: 'numpy.ndarray' object has no attribute 'hist';</p>
  </blockquote>
  
  <p>could you solve this issue please ?</p>