title: looking for marker text option for pyplot.plot()
body: <p>I am looking for a way to insert numbers or text into markers. There  is nothing in the <code>matplotlib.pyplot.plot(*args, **kwargs)</code> documentation about that.</p>
  
  <p>The default zoom level places markers on the edge, hence reducing the available space on which to inscribe text.</p>
  
  <pre><code>import matplotlib.pyplot as plt
  x = [1, 2, 3, 4 ,5]
  y = [1, 4, 9, 6, 10]
  plt.plot(x, y, 'ro',markersize=23)
  plt.show()
  </code></pre>