I've recently done an experiment for one of my physics lab classes where I had to get the positions of an object moving on a path as close as possible to a circular one.
Given the path's graph I want to see how close this graph is from being a circle and I was wondering wether there is quantitative way of expressing this.
My specific graph is slightly eliptical and therefore it has $R_{max}$ and $R_{min}$ the maximum and minimum radiuses. My approach was to see how this two radiuses differ from the average and comment that on the lab report but I feel like there has to be a way of telling how close a given shape is from being circular.
Thanks for the help and sorry for any spelling or grammar mistakes as english is not my first language.