R code to fit a heavy-tailed distribution using the Long Tail model
This code implements F(x) equation from http://firstmonday.org/htbin/cgiwrap/bin/ojs/index.php/fm/article/view/1832/1716
The Long Tail of a catalog is measured using the frequency distribution (e.g. purchases, downloads, etc.), ranked by item popularity.
The F(x) function models the cumulative distribution of the Long Tail data.
It also splits the curve in three parts: Head, Mid and Tail.