The loaded R package versions (in the order mentioned in the chapter):
tools 3.2
plyr 1.8.2 (CRAN)
igraph 0.7.1 (CRAN)
visNetwork 0.3 (CRAN)
miniCRAN 0.2.4 (CRAN)
Further reading:
Statistical Analysis of Network Data with R, Springer by Eric D. Kolaczyk, Gábor Csárdi in 2014
Linked, Plume Publishing, Albert-László Barabási in 2003
Social Network Analysis Labs in R and SoNIA by Sean J. Westwood in 2010 at http://sna.stanford.edu/rlabs.php