title: vertical & horizontal lines in matplotlib
body: <p>I do not quite understand why I am unable to create horizontal and vertical lines at specified limits. I would like to bound the data by this box. However, the sides do not seem to comply with my instructions. Why is this? </p>
  
  <pre><code># CREATING A BOUNDING BOX
  # BOTTOM HORIZONTAL
  plt.axhline(y=.4, xmin=0.25, xmax=0.402, linewidth=2, color = 'k')
  # RIGHT VERTICAL
  plt.axvline(x=0.402, ymin=0.4, ymax = 0.615, linewidth=2, color='k')
  # LEFT VERTICAL
  plt.axvline(x=0.1, ymin=0.58, ymax = 0.79, linewidth=2, color='k')
  plt.show()
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/k47lM.png" alt="enter image description here"></p>