This tutorial is a basic introduction to the R language and the igraph package for network analysis and visualization. It covers network generation, data input and processing, and the basics of graph analysis and visualization. A more recent tutorial covering network basics in R and igraph is on the tutorials page.
Please cite Ognyanova, K. (2016). Network analysis with R and igraph: NetSci X Tutorial. Retrieved from www.kateto.net/networks-r-igraph