title: dot graph in matplotlib is not uniform
body: <p>Plotted using x and y coordinates but the graph is non uniform what should I do ?</p>
  
  <pre><code>    x_axis array(['115.0', '109.0', '99.0', '107.0', '108.0', '108.0', '87.0',
         '108.0', '105.0', '117.0', '102.0', '112.0', '115.0', '102.0',
         '108.0', '94.0', '108.0', '114.0', '115.0', '109.0', '117.0',
         '91.0', '118.0', '108.0', '111.0', '88.0', '113.0', '107.0',
         '110.0', '98.0', '113.0', '109.0', '102.0', '109.0'], dtype=object)
  y_axis array([' 25.0', ' 51.0', ' 52.0', ' 40.0', ' 32.0', ' 32.0', ' 41.0',
         ' 36.0', ' 43.0', ' 53.0', ' 50.0', ' 39.0', ' 54.0', ' 34.0',
         ' 47.0', ' 54.0', ' 27.0', ' 34.0', ' 41.0', ' 39.0', ' 31.0',
         ' 52.0', ' 39.0', ' 35.0', ' 32.0', ' 34.0', ' 42.0', ' 47.0',
         ' 36.0', ' 46.0', ' 42.0', ' 52.0', ' 35.0', ' 37.0'], dtype=object)
      import matplotlib.pyplot as plt
      plt.plot(x_axis,y_axis,'ro')
      plt.show()
  </code></pre>
  
  <p>Output is <a href="https://i.stack.imgur.com/s2nLf.png" rel="nofollow noreferrer">the y-axis is weird</a></p>