title: how can i display value for visualization
body: <p>this is my source code for visualization to bar plot. and i plot by my data. but i need to make a display about value.</p>
  <p>But i don't have any idea. how can i do it?</p>
  <pre><code>bar_width = 0.4
  alpha = 0.5
  
  value_dic = visualization_missing(df_train)
  
  value_data = []
  label_data = []
  count = 5
  
  for i in range (count):
      value_data.append(value_dic[i][0])
      label_data.append(value_dic[i][1])
  
  index = np.arange(count)
      
  p_train = plt.bar(index , value_data , bar_width, color = 'b', alpha = alpha , label = 'Train')
  
  # get number of count missing value in test set by features
  value_dic_test = visualization_missing(df_test)
  
  value_data_test = []
  label_data_test = []
  count = 5
  
  for i in range (count):
      value_data_test.append(value_dic[i][0])
      label_data_test.append(value_dic[i][1])
  
  index = np.arange(count)
  
  p_test = plt.bar(index + bar_width , value_data_test , bar_width , color = 'r' , alpha = alpha , label = 'Test')
  
  #visualization numebr of train,test missing value 
  plt.title = ('Missing Value in Train set &amp; Test set')
  plt.ylabe = (&quot;Number of missing value&quot;)
  plt.xlabe = (&quot;Feature&quot;)
  plt.xticks(index, label_data, fontsize = 10)
  plt.legend((p_train[0], p_test[0]),('Training','Test'), fontsize = 10)
  
      
  plt.show()
  
  </code></pre>
  <p>and then the dataset for visualization.</p>
  <pre><code>[(1456, 'PoolQC'),
   (1408, 'MiscFeature'),
   (1352, 'Alley'),
   (1169, 'Fence'),
   (730, 'FireplaceQu'),
   (227, 'LotFrontage'),
   (78, 'GarageCond'),
   (76, 'GarageType'),
   (45, 'BsmtCond'),
   (44, 'BsmtExposure'),
   (42, 'BsmtFinType2'),
   (16, 'MasVnrType'),
   (15, 'MasVnrArea'),
   (4, 'MSZoning'),
   (2, 'Functional'),
   (1, 'SaleType')]
  </code></pre>
  <p>how can i display the value on the bar chart?</p>