My recent workshop on Visualization in R. There are four different packages in R to visualize data: ggplot2, plotly, googlevis, igraph. In this hands-on workshop you will learn some basics of each package.
Slides: https://www.slideshare.net/obscrivn/r-visualization-ggplot2-googlevis-plotly-igraph-overview
Data set: http://tutorials.iq.harvard.edu/R/Rgraphics/dataSets/landdata-states.csv
(image credit: https://community.uservoice.com/blog/data-visualization-best-practices/)