Intro Ggplot2 has gained a significant popularity in recent year due to its elegant design and compared with Lattice package , ggplot2 provide more generic graphic solution and more fancy graphic view . Recently I am reading a book <ggplot2 elegant graphic for Data Analysis> , try to grasp a skill on plotting on ggplot2 . Start Lets start with the qplot() function which provide similar function to plot(). "shibor " is a dataframe with daily interbank borrow rate in Shanghai from 2007 to Read more [...]