title: How to plot a complete graph in R?
body: <p>I want to plot complete graphs in R.</p>
  
  <p>How can I do that? I found only one package on CRAN that does have a function to generate complete graphs. But this package, namely "RnavGraph", didn't install but exited with error status. Searching further seems to be difficult, because of the different meanings of graph, which is not soley associated with graph structures but also with plots. </p>
  
  <p><em>How can I plot a <a href="http://en.wikipedia.org/wiki/Complete_graph" rel="nofollow">complete graph</a> in R?</em></p>
  
  <p>Ps:
  But I got the following error when I tried to install "RnavGraph":</p>
  
  <pre><code>ERROR: dependencies ‘graph’, ‘RBGL’ are not available for package ‘RnavGraph’
  * removing ‘/home/steve/R/x86_64-unknown-linux-gnu-library/3.0/RnavGraph’
  
  The downloaded source packages are in
      ‘/tmp/RtmpIW4p30/downloaded_packages’
  Warning message:
  In install.packages("RnavGraph") :
    installation of package ‘RnavGraph’ had non-zero exit status
  </code></pre>