title: How to put a label to a matplotlib slider?
body: <p>I have tried a lot with different methods with no success. I think its easy but... First I have a simple line plot and below a slider which is working good updating the plot as I wish. But no I want to have the values below the slider. No way for now as already said, maybe the reason is the bad coding, I'm not the moste experienced one.
  This is a snippet of what I have. The code runs without problems but the labels (sl_xticks) are not seen.</p>
  
  <pre><code>   ...statements for the line plot up to here...
     ax_skal = plt.axes([0.25, 0.05, 0.65, 0.02], facecolor="lightgrey")
     sl_xticks = np.arange(0.6,2, 0.2)
     ax_skal.set_xticks(sl_xticks)    
     s_skal = Slider(ax_skal, 'time scale', 0.5, 2, valinit=1, valfmt='%0.1f')
     s_skal.vline.set_color('blue')
  </code></pre>
  
  <p>Any (working) idea? ;-) I work with Python3 and all libraries updated.
  By the way, during my programming I have seen labels under the slider, but I forgot the way going there because it was wrong. The labels were taken from the line plot with a complete different use.
  I wonder that nobody has put an example until now, because I think its often necessary. Perhaps its too easy...
  Many thanks!    </p>