title: How to plot error bars in polar coordinates in python?
body: <p>I have the following problem: I want to plot some data points in polar coordinates in python, which is easy, using some code like</p>
  
  <pre><code>import numpy as np
  import matplotlib.pyplot as plt
  
  r = 1e04 * np.array([5.31,5.29,5.25,5.19,5.09,4.92,4.67,4.27,3.75,3.56])
  theta = 2*np.pi/360 * np.array(list(range(0, 100, 10)))
  
  plt.polar(theta, r, "ro")
  
  plt.show()
  </code></pre>
  
  <p>but I want to add error bars and I don't find any sufficient solution. Is there already some prebuild matplotlib-code? Or does anyone know how to define the error bars properly? As I understand it, the r-error is just a straight line while the theta-error should be a segment of a circle.</p>