title: How to find a best fit circle/ellipse using R?
body: <p>I've been reading about a few methods to fit a circle to data (like <a href="http://www.cs.bsu.edu/homepages/kerryj/kjones/circles.pdf" rel="nofollow">this</a>). I would like to see how the methods work on real data and thought of using R for this. I tried searching rseek for packages that can help with this but came up with nothing useful.</p>
  
  <p>So, are there packages that help to easily compute the best fit circle for a given data set (similar to how <code>lm()</code> will fit a linear model to a data set)? Otherwise, how might one perform such a task in R?</p>