In January 2008, Naomi Robbins wrote an
excellent article on how to display the evolution of seasonal data.
Jon Peltier (again ;) ) walked this road of cycle plots and panel chart
here and
here.
Finally, Charley Kyd proposed a very good tutorial on how to
create cycle plots with Excel ... a rather long way, especially in the formatting process.
My turn to propose the Sparklines alternative. It took me less than a minute to create this chart.
It consits in 12 line charts, one per month, displayed in a narrow cell.
All cells obviously share the same vertical scale.
The red and blue points represent the minimum and maximum over 12 years.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEigu9CfN_pcEkCw3naWpE3PeLbp72loez3BwuHib9WkvdhAXLvn3Z2wIiPQ9p4QZPL8kCxIhycOWMs0HCc8zllXsVCJ4zH-Ce9MU61wKtObm21PkkkSg25OTSIYgXt_306W0l5P8wWRG8Qm/s320/ScreenShot003.gif)
The file is available for download
here, and requieres the add-in to be installed.