title: Is it possible to generate proper Root Locus Plots with Python 3?
body: <p>I am trying to generate root locus plots via Python 3, but the graphs that Python produces don't seem to be complete.</p>
  
  <p>Here is the system to be implemented for the Root Locus;</p>
  
  <p><a href="https://i.stack.imgur.com/De0v2.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/De0v2.jpg" alt="enter image description here"></a></p>
  
  <p>Here is my code for the Root Locus plot;</p>
  
  <pre><code>import numpy as np
  from matplotlib import pyplot as plt 
  import control
  
  %matplotlib
  
  G = control.TransferFunction((1, 1.5), (1, 11, 10, 0))
  
  rlist, klist = control.rlocus(G)
  
  plt.show()
  </code></pre>
  
  <p>And here is the graph I get;</p>
  
  <p><a href="https://i.stack.imgur.com/s66bM.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/s66bM.png" alt="enter image description here"></a></p>
  
  <p>But from the textbook I'm using, this is the plot that they have;</p>
  
  <p><a href="https://i.stack.imgur.com/eMy02.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/eMy02.jpg" alt="enter image description here"></a></p>
  
  <p>Is there a way to get Python to provide a plot which is closer the actual solution, or is this the best approximation possible with Python right now?</p>