title: Finding circles in scatter
body: <p>I am working with a sensor and I have collected data which represented in two lists:</p>
  
  <pre><code>filtered_x = [64, 90, 83, 78, 57, 58....]
  filtered_y = [26, 17, 63, 21, 62, 86....]
  </code></pre>
  
  <p>Which gives the following scatter plot:</p>
  
  <p><a href="https://i.stack.imgur.com/Oaaff.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Oaaff.png" alt="plot of data"></a></p>
  
  <p>This is part of a calibration process. In order to complete this, I have to find the circles in the plot and come up with coordinates of the centers of the circles so the sensor can be calibrated. Which libraries should I use and how do I go about doing this? I have come across nearest K neighbor but I cannot find any practical approaches to applying this to both lists to identify the centers of the 25 clusters. The readings as a result of a flashing LED board.    </p>