title: Polar histogram in Python for given r, theta and z values
body: <p>I have a dataframe consisting of measurements from a particular magnetometer station over time, with columns corresponding to:</p>
  
  <ul>
  <li>its latitude (which I think of as a radius)</li>
  <li>its azimuthal angle</li>
  <li>a measured quantity at this specific time</li>
  </ul>
  
  <p>I was wondering of a way to plot this dataframe as a polar histogram for the measured variable: ie something like this:</p>
  
  <p><a href="https://i.stack.imgur.com/MfneY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/MfneY.png" alt="Shi et al, 2018, doi:10.1029/2017JA025033"></a></p>
  
  <p>I have looked at the special histogram in <code>physt</code> but this allows me to only put in x,y values and I'm quite confused by it all. </p>
  
  <p>Could anybody help?</p>