Time-series R package
Aaron Benz , Data Scientist Accenture, released (made publicly available) a time-series R package. -January 2015
It has a tutorial/walkthrough of why some might use it and what it offers (being able to plot time-series data – regular/irregular intervals at mass quickly. For example, plotting 5 Million Points in 190 milliseconds).
He still has some work to do on it, but its available here: https://github.com/aaronbenz/timeseries