title: Matplotlib subplot title overlaps with x ticks
body: <p>I have the following code to generate the visuals for feature importance of a model. </p>
  
  <pre><code>def plot_featu_imp(ax,df,plot_title='feature_imp'):
      feature_imp = df
      ax = feature_imp.plot(ax=ax,kind='barh',
                            x='feature_names',y='importn',color='g',sort_columns=True) #figsize=(12,10),
      rects = ax.patches
  
      for rect in rects:
          # Get X and Y placement of label from rect.
          x_value = rect.get_width()
          y_value = rect.get_y() + rect.get_height() / 2
  
          # Number of points between bar and label. Change to your liking.
          space = 5
          # Vertical alignment for positive values
          ha = 'left'
  
          # If value of bar is negative: Place label left of bar
          if x_value &lt; 0:
              # Invert space to place label to the left
              space *= -1
              # Horizontally align label at right
              ha = 'right'
  
          # Use X value as label and format number with one decimal place
          label = "{:.3f}".format(x_value)
  
          # Create annotation
          ax.annotate(
              label,                      # Use `label` as label
              (x_value, y_value),         # Place label at end of the bar
              xytext=(space, 0),          # Horizontally shift label by `space`
              textcoords="offset points", # Interpret `xytext` as offset in points
              va='center',                # Vertically center label
              ha=ha,
              fontsize=15,
              color='tab:grey')                     
  
      ax.spines['top'].set_visible(True)
      ax.spines['right'].set_visible(False)
      ax.spines['bottom'].set_visible(False)
      ax.spines['left'].set_visible(False)
  
      ax.legend().set_visible(False)
      ax.tick_params(top=True, labeltop=True, bottom=False, left=False, right=False, labelleft=True, labelbottom=False,labelsize=20)
      ax.set_xlabel('Importance ',fontsize=20)
      ax.set_ylabel('Feature names',fontsize=20)
      ax.set_title(plot_title,fontsize=25)
  
      ax.title.set_position([0.1,1])
      return ax
  </code></pre>
  
  <p>I want to generate this visual for a series of models. For example.</p>
  
  <pre><code>fig, ax = plt.subplots(2,1, figsize=(20,10), facecolor='w', edgecolor='k')
  # plt.tight_layout()
  for i in range(2):
      df=pd.DataFrame({'feature_names':['a','b','c'],'importn':[0.1,0.3,0.6]})
      plot_featu_imp(ax[i],df,'model'+str(i))
  plt.show()
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/HSBf4.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/HSBf4.png" alt="plot output"></a>
  Now the problem is having a overlap between the title and x-ticks
  I have tried setting the position of the title using set_position but it did not work. Is there any way to create clearance between those two.</p>
  
  <p>Thanks in advance. </p>