lysis Project (SNAP) and the SocioPatterns collaboration<a class="footnote-ref" tabindex="0" data-toggle="popover" data-content='&lt;p&gt;&lt;a href="http://www.sociopatterns.org/" class="uri"&gt;http://www.sociopatterns.org/&lt;/a&gt;&lt;/p&gt;'><sup>2</sup></a> for the data sets they make available to the public, many of which I have used as examples in this book. As always, my thanks go to all the developers who work on the <code>rmarkdown</code> and <code>bookdown</code> R packages which allow me to wri