title: Scatterplot Contours In Matplotlib
body: <p>I have a massive scatterplot (~100,000 points) that I'm generating in matplotlib. Each point has a location in this x/y space, and I'd like to generate contours containing certain percentiles of the total number of points.</p>
  
  <p>Is there a function in matplotlib which will do this? I've looked into contour(), but I'd have to write my own function to work in this way.</p>
  
  <p>Thanks!</p>