title: Plot hourly result using Python
body: <p>I have result of hourly price by using group by:</p>
  
  <pre><code>group=df.groupby("hour")["price"].mean()
  </code></pre>
  
  <p>and then I normalize the result by max price by using this code:</p>
  
  <pre><code>nor=preprocessing.normalize(group, norm='max')
  </code></pre>
  
  <p>I then plot the result using this code:</p>
  
  <pre><code>plt.figure()
  
  plt.plot( nor,
          label='price 1',
          color='red')
  plt.xlim(0,24)
  plt.ylim([0.0, 1])
  plt.xlabel('time')
  plt.ylabel('price')
  plt.title('g2')
  plt.legend(loc='upper right', fancybox=True)
  
  plt.show()
  </code></pre>
  
  <p>but it does not show anything?</p>