title: R: Error in tkplot(): tcl/tk library not available
body: <p>My goal is to create an interactive graph:
  <p>
  <code>tkid &lt;- tkplot(my_igraph_network_object)
  l &lt;- tkplot.getcoords(tkid)
  plot(net, layout=l)</code>
  <p>
  Which yields an error in the first line: "Error in tkplot(net) : tcl/tk library not available."</p>
  
  <p><p>
  I tried to install the package manually:
  <p>
  <code>install.packages("tcltk")</code>
  <p>
  Running that line returned two warnings: 1.) "Warning in install.packages :   package ‘tcltk’ is not available (for R version 3.3.0)", 2.) "Warning in install.packages :   package ‘tcltk’ is a base package, and should not be updated"</p>
  
  <p>Platform: x86_64-apple-darwin13.4.0.<br>R version: 3.3.0 (2016-05-03).</p>
  
  <p>Also I noticed there is a similar question <a href="https://stackoverflow.com/questions/34180088/r-arulesviz-and-igraph-causing-a-conflict">here</a>, but the difference is that I need the igraph package.</p>
  
  <p>Does someone have an idea how to deal with this error?</p>
  
  <p>[Edit 1 @ 20160517] Also I was notified that it is a duplicate of <a href="https://stackoverflow.com/questions/25212800/error-onload-failed-in-loadnamespace-for-tcltk">this question</a>, however the error message I get seems different. I tried the answers that were provided for this question, however, those don't seem to get me closer to fixing it.</p>