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This post presents an example of social network analysis with R using package igraph.
The data to analyze is Twitter text data of @RData Mining used in the example of Text Mining, and it can be downloaded as file "term Doc Matrix.rdata" at the Data webpage.
The study of these structures uses methods of social network analysis to identify local and global patterns, locate influential entities, and examine network dynamics.
People talk about "surfing the web" and..a growing online population stole the show from IRC and BBS communities in the mid-90s.
Web pages were more attractive and much easier for people to visit, and most users new to the Internet flocked to them rather than the older, more interactive forms of online communication.
So what were those early social networks – and what killed them?
Social networks originate from early forms of online communication such as the Bulletin Board System (BBS) and, later, Internet Relay Chat (IRC).